Tableau Functions (Alphabetical)
The Tableau functions in this reference are organized alphabetically. Click a letter to jump to that location in the list. You can also use Ctrl+F (CommandF on a Mac) to open a search box to look for a specific function.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A
ABS
Syntax  ABS(number)

Output  Number (positive) 
Definition  Returns the absolute value of the given <number> . 
Example  ABS(7) = 7 The second example returns the absolute value for all the numbers contained in the Budget Variance field. 
Notes  See also SIGN . 
ACOS
Syntax  ACOS(number)

Output  Number (angle in radians) 
Definition  Returns the arccosine (angle) of the given <number> . 
Example  ACOS(1) = 3.14159265358979 
Notes  The inverse function, COS , takes the angle in radians as the argument and returns the cosine. 
AND
Syntax  <expr1> AND <expr2>

Definition  Performs a logical conjunction on two expressions. (If both sides are true, the logical test returns true.) 
Output  Boolean 
Example  IF [Season] = "Spring" AND "[Season] = "Fall" "If both (Season = Spring) and (Season = Fall) are true simultaneously, then return It's the apocalypse and footwear doesn't matter." 
Notes 
Often used with IF and IIF. See also NOT and OR. If both expressions are If you create a calculation in which the result of an Note: The 
AREA
Syntax  AREA(Spatial Polygon, 'units')

Output  Number 
Definition  Returns the total surface area of a <spatial polygon> . 
Example  AREA([Geometry], 'feet') 
Notes 
Supported unit names (must be in quotation marks in the calculation, such as

ASCII
Syntax  ASCII(string)

Output  Number 
Definition  Returns the ASCII code for the first character of a <string> . 
Example  ASCII('A') = 65 
Notes  This is the inverse of the CHAR function. 
ASIN
Syntax  ASIN(number)

Output  Number (angle in radians) 
Definition  Returns the arcsine (angle) of a given <number> . 
Example  ASIN(1) = 1.5707963267949 
Notes  The inverse function, SIN , takes the angle in radians as the argument and returns the sine. 
ATAN
Syntax  ATAN(number)

Output  Number (angle in radians) 
Definition  Returns the arctangent (angle) of a given <number> . 
Example  ATAN(180) = 1.5652408283942 
Notes 
The inverse function, 
ATAN2
Syntax  ATAN2(y number, x number)

Output  Number (angle in radians) 
Definition  Returns the arctangent (angle) between two numbers (<y number> and <x number> ). The result is in radians. 
Example  ATAN2(2, 1) = 1.10714871779409 
Notes  See also ATAN , TAN , and COT . 
ATTR
Syntax  ATTR(expression)

Definition  Returns the value of the <expression> if it has a single value for all rows. Otherwise returns an asterisk. Null values are ignored. 
AVG
Syntax  AVG(expression)

Definition  Returns the average of all the values in the <expression> . Null values are ignored. 
Notes  AVG can only be used with numeric fields. 
B
BUFFER
Syntax  BUFFER(Spatial Point, distance, 'units')

Output  Geometry 
Definition  Returns a polygon shape centered over a <spatial point> , with a radius determined by the <distance> and <unit> values. 
Example  BUFFER([Spatial Point Geometry], 25, 'mi') BUFFER(MAKEPOINT(47.59, 122.32), 3, 'km') 
Notes 
Supported unit names (must be in quotation marks in the calculation, such as

C
CASE
Syntax  CASE <expression>

Output  Depends on data type of the <then> values. 
Definition 
Evaluates the 
Example 
"Look at the Season field. If the value is Summer, then return Sandals. If the value is Winter, then return Boots. If none of the options in the calculation match what is in the Season field, return a Sneakers." 
Notes 
Used with WHEN, THEN, ELSE, and END. Tip: Many times you can use a group to get the same results as a complicated CASE function, or use CASE to replace native grouping functionality, such as in the previous example. You may want to test which is more performant for your scenario. 
CEILING
Syntax  CEILING(number)

Output  Integer 
Definition  Rounds a <number> to the nearest integer of equal or greater value. 
Example  CEILING(2.1) = 3 
Notes  See also FLOOR and ROUND . 
Database limitations 

CHAR
Syntax  CHAR(number)

Output  String 
Definition  Returns the character encoded by the ASCII code <number> . 
Example  CHAR(65) = 'A' 
Notes  This is the inverse of the ASCII function. 
COLLECT
Syntax  COLLECT(spatial)

Definition  An aggregate calculation that combines the values in the argument field. Null values are ignored. 
Notes  COLLECT can only be used with spatial fields. 
CONTAINS
Syntax  CONTAINS(string, substring)

Output  Boolean 
Definition  Returns true if the given <string> contains the specified <substring> . 
Example  CONTAINS("Calculation", "alcu") = true 
Notes  See also the logical function(Link opens in a new window) IN as well as supported RegEx in the additional functions documentation(Link opens in a new window). 
CORR
Syntax  CORR(expression1, expression2)

Output  Number from 1 to 1 
Definition  Returns the Pearson correlation coefficient of two expressions. 
Example  example 
Notes 
The Pearson correlation measures the linear relationship between two variables. Results range from 1 to +1 inclusive, where 1 denotes an exact positive linear relationship, 0 denotes no linear relationship between the variance, and −1 is an exact negative relationship. The square of a CORR result is equivalent to the RSquared value for a linear trend line model. See Trend Line Model Terms(Link opens in a new window). Use with table scoped LOD expressions: You can use CORR to visualize correlation in a disaggregated scatter using a tablescoped level of detail expression(Link opens in a new window). For example: {CORR(Sales, Profit)} With a level of detail expression, the correlation is run over all rows. If you used a formula like 
Database limitations 
For other data sources, consider either extracting the data or using 
COS
Syntax  COS(number)
The number argument is the angle in radians. 
Output  Number 
Definition  Returns the cosine of an angle. 
Example  COS(PI( ) /4) = 0.707106781186548 
Notes 
The inverse function, See also 
COT
Syntax  COT(number)
The number argument is the angle in radians. 
Output  Number 
Definition  Returns the cotangent of an angle. 
Example  COT(PI( ) /4) = 1 
Notes  See also ATAN , TAN , and PI . 
COUNT
Syntax  COUNT(expression)

Definition  Returns the number of items. Null values are not counted. 
COUNTD
Syntax  COUNTD(expression)

Definition  Returns the number of distinct items in a group. Null values are not counted. 
COVAR
Syntax  COVAR(expression1, expression2)

Definition  Returns the sample covariance of two expressions. 
Notes 
Covariance quantifies how two variables change together. A positive covariance indicates that the variables tend to move in the same direction, as when larger values of one variable tend to correspond to larger values of the other variable, on average. Sample covariance uses the number of nonnull data points n  1 to normalize the covariance calculation, rather than n, which is used by the population covariance (available with the If The value of 
Database limitations 
For other data sources, consider either extracting the data or using 
COVARP
Syntax  COVARP(expression 1, expression2)

Definition  Returns the population covariance of two expressions. 
Notes 
Covariance quantifies how two variables change together. A positive covariance indicates that the variables tend to move in the same direction, as when larger values of one variable tend to correspond to larger values of the other variable, on average. Population covariance is sample covariance multiplied by (n1)/n, where n is the total number of nonnull data points. Population covariance is the appropriate choice when there is data available for all items of interest as opposed to when there is only a random subset of items, in which case sample covariance (with the If 
Database limitations 
For other data sources, consider either extracting the data or using 
D
DATE
Type conversion function that changes string and number expressions into dates, as long as they are in a recognizable format.
Syntax  DATE(expression)

Output  Date 
Definition  Returns a date given a number, string, or date <expression> . 
Example  DATE([Employee Start Date]) DATE("September 22, 2018") DATE("9/22/2018") DATE(#20180922 14:52#) 
Notes 
Unlike

DATEADD
Adds a specified number of date parts (months, days, etc) to the starting date.
Syntax  DATEADD(date_part, interval, date)

Output  Date 
Definition  Returns the specified date with the specified number <interval> added to the specified ><date_part of that date. For example, adding three months or 12 days to a starting date. 
Example 
Push out all due dates by one week DATEADD('week', 1, [due date]) Add 280 days to the date February 20, 2021 DATEADD('day', 280, #2/20/21#) = #November 27, 2021# 
Notes  Supports ISO 8601 dates. 
DATEDIFF
Returns the number of date parts (weeks, years, etc) between two dates.
Syntax  DATEDIFF(date_part, date1, date2, [start_of_week])

Output  Integer 
Definition  Returns the difference between date1 and date2 expressed in units of date_part . For example, subtracting the dates someone entered and left a band to see how long they were in the band. 
Example 
Number of days between March 25, 1986 and February 20, 2021 DATEDIFF('day', #3/25/1986#, #2/20/2021#) = 12,751 How many months someone was in a band DATEDIFF('month', [date joined band], [date left band]) 
Notes  Supports ISO 8601 dates. 
DATENAME
Returns the name of the specified date part as a discrete string.
Syntax  DATENAME(date_part, date, [start_of_week])

Output  String 
Definition  Returns <date_part> of date as a string. 
Example  DATENAME('year', #3/25/1986#) = "1986" DATENAME('month', #19860325#) = "March" 
Notes 
Supports ISO 8601 dates. A very similar calculation is DATEPART, which returns the value of the specified date part as a continuous integer. By changing the attributes of the calculation’s result (dimension or measure, continuous or discrete) and the date formatting, the results of An inverse function is 
DATEPARSE
Returns specifically formatted strings as dates.
Syntax  DATEPARSE(date_format, date_string)

Output  Date 
Definition  The <date_format> argument describes how the <date_string> field is arranged. Because of the variety of ways the string field can be ordered, the <date_format> must match exactly. For a full explanation, see Convert a Field to a Date Field(Link opens in a new window). 
Example  DATEPARSE('yyyyMMdd', "19860325") = #March 25, 1986# 
Notes 
Inverse functions, which take dates apart and return the value of their parts, are 
Database limitations 

DATEPART
Returns the name of the specified date part as an integer.
Syntax  DATEPART(date_part, date, [start_of_week])

Output  Integer 
Definition  Returns <date_part> of date as an integer. 
Example  DATEPART('year', #19860325#) = 1986 DATEPART('month', #19860325#) = 3 
Notes 
Supports ISO 8601 dates. A very similar calculation is An inverse function is 
DATETIME
Syntax  DATETIME(expression)

Output  Datetime 
Definition  Returns a datetime given a number, string, or date expression. 
Example  DATETIME("April 15, 2005 07:59:00") = April 15, 2005 07:59:00 
DATETRUNC
This function can be thought of as date rounding. It takes a specific date and returns a version of that date at the desired specificity. Because every date must have a value for day, month, quarter, and year, DATETRUNC
sets the values as the lowest value for each date part up to the date part specified. Refer to the example for more information.
Syntax  DATETRUNC(date_part, date, [start_of_week])

Output  Date 
Definition  Truncates the <date> to the accuracy specified by the <date_part> . This function returns a new date. For example, when you truncate a date that is in the middle of the month at the month level, this function returns the first day of the month. 
Example  DATETRUNC('day', #9/22/2018#) = #9/22/2018# DATETRUNC('isoweek', #9/22/2018#) = #9/17/2018# (the monday of the week containing 9/22/2018) DATETRUNC(quarter, #9/22/2018#) = #7/1/2018# (the first day of the quarter containing 9/22/2018) Note: For week and isoweek, the 
Notes 
Supports ISO 8601 dates. You shouldn't use For example, 
DAY
Returns the day of the month (131) as an integer.
Syntax  DAY(date)

Output  Integer 
Definition  Returns the day of the given <date> as an integer. 
Example  Day(#September 22, 2018#) = 22 
Notes  See also WEEK , MONTH , Quarter , YEAR , and the ISO equivalents 
DEGREES
Syntax  DEGREES(number)
The number argument is the angle in radians. 
Output  Number (degrees) 
Definition  Converts an angle in radians to degrees. 
Example  DEGREES(PI( )/4) = 45.0 
Notes 
The inverse function, See also 
DISTANCE
Syntax  DISTANCE(<SpatialPoint1>, <SpatialPoint2>, 'units')

Output  Number 
Definition  Returns the distance measurement between two points in the specified units . 
Example  DISTANCE([Origin Point],[Destination Point], 'km') 
Notes 
Supported unit names (must be in quotation marks in the calculation):

Database limitations  This function can only be created with a live connection but will continue to work if the data source is converted to an extract. 
DIV
Syntax  DIV(integer1, integer2)

Output  Integer 
Definition  Returns the integer part of a division operation, in which <integer1> is divided by <integer2> . 
Example  DIV(11,2) = 5 
DOMAIN
DOMAIN(string_url)
Only supported when connected to Google BigQuery. For more information, see Additional Functions(Link opens in a new window).
E
ELSE
Syntax  CASE <expression>

Definition  An optional piece of an IF or CASE expression used to specify a default value to return if none of the tested expressions are true. 
Example  IF [Season] = "Summer" THEN 'Sandals' CASE [Season] 
Notes 
Used with CASE, WHEN, IF, ELSEIF, THEN, and END

ELSEIF
Syntax  [ELSEIF <test2> THEN <then2>]

Definition  An optional piece of an IF expression used to specify additional conditions beyond the initial IF. 
Example  IF [Season] = "Summer" THEN 'Sandals' 
Notes 
Used with IF, THEN, ELSE, and END
Unlike 
END
Definition  Used to close an IF or CASE expression. 
Example  IF [Season] = "Summer" THEN 'Sandals' "If Season = Summer, then return Sandals. If not, look at the next expression. If Season = Winter, then return Boots. If neither of the expressions are true, return Sneakers." CASE [Season] "Look at the Season field. If the value is Summer, then return Sandals. If the value is Winter, then return Boots. If none of the options in the calculation match what is in the Season field, return a Sneakers." 
Notes 
ENDSWITH
ENDSWITH
Syntax  ENDSWITH(string, substring)

Output  Boolean 
Definition  Returns true if the given <string> ends with the specified <substring> . Trailing white spaces are ignored. 
Example  ENDSWITH("Tableau", "leau") = true 
Notes  See also the supported RegEx in the additional functions documentation(Link opens in a new window). 
EXCLUDE
For more information, see Level of Detail Expressions(Link opens in a new window).
EXP
Syntax  EXP(number)

Output  Number 
Definition  Returns e raised to the power of the given <number> . 
Example  EXP(2) = 7.389 
Notes  See also LN . 
F
FIND
Syntax  FIND(string, substring, [start])

Output  Number 
Definition 
Returns the index position of If the optional numeric argument 
Example  FIND("Calculation", "alcu") = 2 FIND("Calculation", "Computer") = 0 FIND("Calculation", "a", 3) = 7 FIND("Calculation", "a", 2) = 2 FIND("Calculation", "a", 8) = 0 
Notes  See also the supported RegEx in the additional functions documentation(Link opens in a new window). 
FINDNTH
Syntax  FINDNTH(string, substring, occurrence)

Output  Number 
Definition  Returns the position of the nth occurrence of <substring> within the specified <string> , where n is defined by the <occurence> argument. 
Example  FINDNTH("Calculation", "a", 2) = 7 
Notes 
See also the supported RegEx in the additional functions documentation(Link opens in a new window). 
FIRST
FIRST()
For more information, see Table Calculation Functions(Link opens in a new window).
FIXED
For more information, see Level of Detail Expressions(Link opens in a new window).
FLOAT
Syntax  FLOAT(expression)

Output  Floating point number (decimal) 
Definition  Casts its argument as a floating point number. 
Example  FLOAT(3) = 3.000 
Notes  See also INT which returns an integer. 
FLOOR
Syntax  FLOOR(number)

Output  Integer 
Definition  Rounds a <number> to the nearest integer of equal or lesser value. 
Example  FLOOR(7.9) = 7 
Notes  See also CEILING and ROUND . 
Database limitations 

FULLNAME
Syntax  FULLNAME( )

Output  String 
Definition 
Returns the full name for the current user. 
Example  FULLNAME( ) This returns the full name of the signed in user, such as "Hamlin Myrer". [Manager] = FULLNAME( ) If manager "Hamlin Myrer" is signed in, this example returns TRUE only if the Manager field in the view contains "Hamlin Myrer". 
Notes 
This function checks:
User filters When used as a filter, a calculated field such as 
G
GET_JSON_OBJECT
GET_JSON_OBJECT(JSON string, JSON path)
Only supported when connected to Hadoop Hive. For more information, see Additional Functions(Link opens in a new window).
GROUP_CONCAT
GROUP_CONCAT(expression)
Only supported when connected to Google BigQuery. For more information, see Additional Functions(Link opens in a new window).
H
HEXBINX
Syntax  HEXBINX(number, number)

Output  Number 
Definition  Maps an x, y coordinate to the xcoordinate of the nearest hexagonal bin. The bins have side length 1, so the inputs may need to be scaled appropriately. 
Example  HEXBINX([Longitude]*2.5, [Latitude]*2.5) 
Notes  HEXBINX and HEXBINY are binning and plotting functions for hexagonal bins. Hexagonal bins are an efficient and elegant option for visualizing data in an x/y plane such as a map. Because the bins are hexagonal, each bin closely approximates a circle and minimizes variation in the distance from the data point to the center of the bin. This makes the clustering both more accurate and informative. 
HEXBINY
Syntax  HEXBINY(number, number)

Output  Number 
Definition  Maps an x, y coordinate to the ycoordinate of the nearest hexagonal bin. The bins have side length 1, so the inputs may need to be scaled appropriately. 
Example  HEXBINY([Longitude]*2.5, [Latitude]*2.5) 
Notes  See also HEXBINX . 
HOST
HOST(string_url)
Only supported when connected to Google BigQuery. For more information, see Additional Functions(Link opens in a new window).
I
IF
Syntax  IF <test1> THEN <then1>

Output  Depends on data type of the <then> values. 
Definition 
Tests a series of expressions and returns the 
Example  IF [Season] = "Summer" THEN 'Sandals' "If Season = Summer, then return Sandals. If not, look at the next expression. If Season = Winter, then return Boots. If neither of the expressions are true, return Sneakers." 
Notes 
IFNULL
Syntax  IFNULL(expr1, expr2)

Output  Depends on the data type of the <expr> values. 
Definition 
Returns 
Example  IFNULL([Assigned Room], "TBD") "If the Assigned Room field isn't null, return its value. If the Assigned room field is null, return TBD instead." 
Notes 
Compare with ISNULL. See also ZN. 
IIF
Syntax  IIF(<test>, <then>, <else>, [<unknown>])

Output  Depends on the data type of the values in the expression. 
Definition  Checks whether a condition is met (<test> ), and returns <then> if the test is true, <else> if the test is false, and an optional value for <unknown> if the test is null. If the optional unknown isn't specified, IIF returns null. 
Example  IIF([Season] = 'Summer', 'Sandals', 'Other footwear') "If Season = Summer, then return Sandals. If not, return Other footwear" IIF([Season] = 'Summer', 'Sandals', "If Season = Summer, then return Sandals. If not, look at the next expression. If Season = Winter, then return Boots. If neither are true, return Sneakers." IIF('Season' = 'Summer', 'Sandals', "If Season = Summer, then return Sandals. If not, look at the next expression. If Season = Winter, then return Boots. If none of the expressions are true, return Sneakers." 
Notes 
That is to say, in the calculation below, the result will be Red, not Orange, because the expression stops being evaluated as soon as A=A is evaluated as true: 
IN
Syntax  <expr1> IN <expr2>

Output  Boolean (true or false) 
Definition 
Returns TRUE if any value in <expr1> matches any value in <expr2> . 
Example  SUM([Cost]) IN (1000, 15, 200) "Is the value of the Cost field 1000, 15, or 200?" [Field] IN [Set] "Is the value of the field present in the set?" 
Notes 
The values in See also WHEN. 
INCLUDE
For more information, see Level of Detail Expressions(Link opens in a new window).
INDEX
INDEX( )
For more information, see Table Calculation Functions(Link opens in a new window).
INT
Syntax  INT(expression)

Output  Integer 
Definition  Casts its argument as an integer. For expressions, this function truncates results to the closest integer toward zero. 
Example  INT(8/3) = 2 INT(9.7) = 9 
Notes 
When a string is converted to an integer it is first converted to a float and then rounded. See also 
INTERSECTS
Syntax  INTERSECTS (<geometry1>, <geometry2>)

Output  Boolean 
Definition  Returns true or false indicating if two geometries overlap in space. 
Notes  Supported combinations: point/polygon, line/polygon, and polygon/polygon. 
ISDATE
Checks if the string is a valid date format.
Syntax  ISDATE(string)

Output  Boolean 
Definition  Returns true if a given <string> is a valid date. 
Example  ISDATE(09/22/2018) = true ISDATE(22SEP18) = false 
Notes  The required argument must be a string. ISDATE cannot be used for a field with a date data type—the calculation will return an error. 
ISFULLNAME
Syntax  ISFULLNAME("User Full Name")

Output  Boolean 
Definition 
Returns 
Example  ISFULLNAME("Hamlin Myrer") 
Notes 
The This function checks:

ISMEMBEROF
Syntax  ISMEMBEROF("Group Name")

Output  Boolean or null 
Definition 
Returns 
Example  ISMEMBEROF('Superstars') ISMEMBEROF('domain.lan\Sales') 
Notes 
The If the user is signed in to Tableau Cloud or Tableau Server, group membership is determined by Tableau groups. The function will return TRUE if the given string is "All Users" The 
ISNULL
Syntax  ISNULL(expression)

Output  Boolean (true or false) 
Definition 
Returns true if the 
Example  ISNULL([Assigned Room]) "Is the Assigned Room field null?" 
Notes 
Compare with IFNULL. See also ZN. 
ISOQUARTER
Syntax  ISOQUARTER(date)

Output  Integer 
Definition  Returns the ISO8601 weekbased quarter of a given <date> as an integer. 
Example  ISOQUARTER(#19860325#) = 1 
Notes  See also ISOWEEK , ISOWEEKDAY , ISOYEAR , and the nonISO equivalents. 
ISOWEEK
Syntax  ISOWEEK(date)

Output  Integer 
Definition  Returns the ISO8601 weekbased week of a given <date> as an integer. 
Example  ISOWEEK(#19860325#) = 13 
Notes  See also ISOWEEKDAY , ISOQUARTER , ISOYEAR , and the nonISO equivalents. 
ISOWEEKDAY
Syntax  ISOWEEKDAY(date)

Output  Integer 
Definition  Returns the ISO8601 weekbased weekday of a given <date> as an integer. 
Example  ISOWEEKDAY(#19860325#) = 2 
Notes  See also ISOWEEK , ISOQUARTER , ISOYEAR , and the nonISO equivalents 
ISOYEAR
Syntax  ISOYEAR(date)

Output  Integer 
Definition  Returns the ISO8601 weekbased year of a given date as an integer. 
Example  ISOYEAR(#19860325#) = 1,986 
Notes  See also ISOWEEK , ISOWEEKDAY , ISOQUARTER , and the nonISO equivalents. 
ISUSERNAME
Syntax  ISUSERNAME("username")

Output  Boolean 
Definition  Returns TRUE if the current user's username matches the specified <username> or FALSE if it does not match. 
Example  ISUSERNAME("hmyrer") 
Notes 
The This function checks:

J
K
L
LAST
LAST()
For more information, see Table Calculation Functions(Link opens in a new window).
LEFT
Syntax  LEFT(string, number)

Output  String 
Definition  Returns the leftmost <number> of characters in the string. 
Example  LEFT("Matador", 4) = "Mata" 
Notes  See also MID and RIGHT. 
LEN
Syntax  LEN(string)

Output  Number 
Definition  Returns the length of the <string> . 
Example  LEN("Matador") = 7 
Notes  Not to be confused with the spatial function LENGTH . 
LENGTH
Syntax  LENGTH(geometry, 'units')

Output  Number 
Definition  Returns the geodetic path length of the line string or strings in the <geometry> using the given <units> . 
Example  LENGTH([Spatial], 'metres') 
Notes 
The result is Not to be confused with the string function 
LN
Syntax  LN(number)

Output 
Number The output is 
Definition  Returns the natural logarithm of a <number> . 
Example  LN(50) = 3.912023005 
Notes  See also EXP and LOG . 
LOG
Syntax  LOG(number, [base])
If the optional base argument isn't present, base 10 is used. 
Output  Number 
Definition  Returns the logarithm of a <number> for the given <base> . 
Example  LOG(16,4) = 2 
Notes  See also POWER LN . 
LOG2
LOG2(number)
Only supported when connected to Google BigQuery. For more information, see Additional Functions(Link opens in a new window).
LOOKUP
LOOKUP(expression, [offest])
For more information, see Table Calculation Functions(Link opens in a new window).
LOWER
Syntax  LOWER(string)

Output  String 
Definition  Returns the provided <string> in all lowercase characters. 
Example  LOWER("ProductVersion") = "productversion" 
Notes  See also UPPER and PROPER. 
LTRIM
Syntax  LTRIM(string)

Output  String 
Definition  Returns the provided <string> with any leading spaces removed. 
Example  LTRIM(" Matador ") = "Matador " 
Notes  See also RTRIM. 
LTRIM_THIS
LTRIM_THIS(string, string)
Only supported when connected to Google BigQuery. For more information, see Additional Functions(Link opens in a new window).
M
MAKEDATE
Syntax  MAKEDATE(year, month, day)

Output  Date 
Definition  Returns a date value constructed from the specified <year> , <monthg> , and <day> . 
Example  MAKEDATE(1986,3,25) = #19860325# 
Notes 
Note: Incorrectly entered values will be adjusted into a date, such as Available for Tableau Data Extracts. Check for availability in other data sources.

MAKEDATETIME
Syntax  MAKEDATETIME(date, time)

Output  Datetime 
Definition  Returns a datetime that combines a <date> and a <time> . The date can be a date, datetime, or a string type. The time must be a datetime. 
Example  MAKEDATETIME("18991230", #07:59:00#) = #12/30/1899 7:59:00 AM# MAKEDATETIME([Date], [Time]) = #1/1/2001 6:00:00 AM# 
Notes 
This function is available only for MySQLcompatible connections (which for Tableau are MySQL and Amazon Aurora).

MAKELINE
Syntax  MAKELINE(SpatialPoint1, SpatialPoint2)

Output  Geometry (line) 
Definition  Generates a line mark between two points 
Example  MAKELINE(MAKEPOINT(47.59, 122.32), MAKEPOINT(48.5, 123.1)) 
Notes  Useful for building origindestination maps. 
MAKEPOINT
Syntax  MAKEPOINT(latitude, longitude, [SRID])

Output  Geometry (point) 
Definition 
Converts data from If the optional 
Example  MAKEPOINT(48.5, 123.1) MAKEPOINT([AirportLatitude], [AirportLongitude]) MAKEPOINT([Xcoord],[Ycoord], 3493) 
Notes 
SRID is a spatial reference identifier that uses ESPG reference system codes(Link opens in a new window) to specify coordinate systems. If SRID is not specified, WGS84 is assumed and parameters are treated as latitude/longitude in degrees. You can use 
MAKETIME
Syntax  MAKETIME(hour, minute, second)

Output  Datetime 
Definition  Returns a date value constructed from the specified <hour> , <minute> , and <second> . 
Example  MAKETIME(14, 52, 40) = #1/1/1899 14:52:40# 
Notes 
Because Tableau does not support a time data type, only datetime, the output is a datetime. The date portion of the field will be 1/1/1899. Similar function to 
MAX
Syntax  MAX(expression) or MAX(expr1, expr2) 
Output  Same data type as the argument, or NULL if any part of the argument is null. 
Definition 
Returns the maximum of the two arguments, which must be of the same data type.

Example  MAX(4,7) = 7 
Notes 
For strings
For database data sources, the For dates For dates, the As an aggregation
As a comparison
See also 
MEDIAN
Syntax  MEDIAN(expression)

Definition  Returns the median of an expression across all records. Null values are ignored. 
Notes  MEDIAN can only be used with numeric fields. 
Database limitations 
For other data source types, you can extract your data into an extract file to use this function. See Extract Your Data(Link opens in a new window). 
MID
Syntax  (MID(string, start, [length])

Output  String 
Definition 
Returns a string starting at the specified If the optional numeric argument 
Example  MID("Calculation", 2) = "alculation" MID("Calculation", 2, 5) ="alcul" 
Notes  See also the supported RegEx in the additional functions documentation(Link opens in a new window). 
MIN
Syntax  MIN(expression) or MIN(expr1, expr2) 
Output  Same data type as the argument, or NULL if any part of the argument is null. 
Definition 
Returns the maximum of the two arguments, which must be of the same data type.

Example  MIN(4,7) = 4 
Notes 
For strings
For database data sources, the For dates For dates, the As an aggregation
As a comparison
See also 
Model Extensions
For more information, see Table Calculation Functions(Link opens in a new window).
 MODEL_EXTENSION_BOOL
 MODEL_EXTENSION_INT
 MODEL_EXTENSION_REAL
 MODEL_EXTENSION_STR
MODEL_PERCENTILE
Syntax  MODEL_PERCENTILE(

Definition  Returns the probability (between 0 and 1) of the expected value being less than or equal to the observed mark, defined by the target expression and other predictors. This is the Posterior Predictive Distribution Function, also known as the Cumulative Distribution Function (CDF). 
Example  MODEL_PERCENTILE( SUM([Sales]),COUNT([Orders])) 
MODEL_QUANTILE
Syntax  MODEL_QUANTILE(

Definition  Returns a target numeric value within the probable range defined by the target expression and other predictors, at a specified quantile. This is the Posterior Predictive Quantile. 
Example  MODEL_QUANTILE(0.5, SUM([Sales]), COUNT([Orders])) 
MONTH
Syntax  MONTH(date)

Output  Integer 
Definition  Returns the month of the given <date> as an integer. 
Example  MONTH(#19860325#) = 3 
Notes  See also DAY , WEEK , Quarter , YEAR , and the ISO equivalents 
N
NOT
Syntax  NOT <expression>

Output  Boolean (true or false) 
Definition  Performs logical negation on an expression. 
Example  IF NOT [Season] = "Summer" "If Season doesn't equal Summer, then return Don't wear sandals. If not, return Wear sandals." 
Notes 
Often used with IF and IIF. See also The Tableau functions in this reference are organized alphabetically. Click a letter to jump to that location in the list. You can also use Ctrl+F (CommandF on a Mac) to open a search box to look for a specific function. and OR. 
NOW
Syntax  NOW()

Output  Datetime 
Definition  Returns the current local system date and time. 
Example  NOW() = 19860325 1:08:21 PM 
Notes 
See also If the data source is a live connection, the system date and time could be in another timezone. For more information on how to address this, see the Knowledge Base. 
O
OR
Syntax  <expr1> OR <expr2>

Output  Boolean (true or false) 
Definition  Performs a logical disjunction on two expressions. 
Example  IF [Season] = "Spring" OR [Season] = "Fall" "If either (Season = Spring) or (Season = Fall) is true, then return Sneakers." 
Notes 
Often used with IF and IIF. See also The Tableau functions in this reference are organized alphabetically. Click a letter to jump to that location in the list. You can also use Ctrl+F (CommandF on a Mac) to open a search box to look for a specific function. and NOT. If either expression
is If you create
a calculation which displays the result of an Note: The 
OUTLINE
Syntax  OUTLINE(<spatial polygon>)

Output  Geometry 
Definition  Converts a polygon geometry into linestrings. 
Notes 
Useful for creating a separate layer for an outline that can be styled differently than the fill. Supports polygons within multipolygons. 
P
PARSE_URL
PARSE_URL(string, url_part)
Only supported when connected to Cloudera Impala. For more information, see Additional Functions(Link opens in a new window).
PARSE_URL_QUERY
PARSE_URL_QUERY(string, key)
Only supported when connected to Cloudera Impala. For more information, see Additional Functions(Link opens in a new window).
PERCENTILE
Syntax  PERCENTILE(expression, number)

Definition  Returns the percentile value from the given <expression> corresponding to the specified <number> . The <number> must be between 0 and 1 (inclusive) and must be a numeric constant. 
Example  PERCENTILE([Score], 0.9) 
Database limitations 
This function is available for the following data sources: Nonlegacy Microsoft Excel and Text File connections, Extracts and extractonly data source types (for example, Google Analytics, OData, or Salesforce), Sybase IQ 15.1 and later data sources, Oracle 10 and later data sources, Cloudera Hive and Hortonworks Hadoop Hive data sources, EXASolution 4.2 and later data sources. For other data source types, you can extract your data into an extract file to use this function. See Extract Your Data(Link opens in a new window). 
PI
Syntax  PI()

Output  Number 
Definition  Returns the numeric constant pi: 3.14159... 
Example  PI() = 3.14159 
Notes  Useful for trig functions that take their input in radians. 
POWER
Syntax  POWER(number, power)

Output  Number 
Definition  Raises the <number> to the specified <power> . 
Example  POWER(5,3) = 125 
Notes  You can also use the ^ symbol, such as 5^3 = POWER(5,3) = 125 
PREVIOUS_VALUE
PREVIOUS_VALUE(expression)
For more information, see Table Calculation Functions(Link opens in a new window).
PROPER
Syntax  PROPER(string)

Output  String 
Definition 
Returns the provided 
Example  PROPER("PRODUCT name") = "Product Name" PROPER("darcymae") = "DarcyMae" 
Notes 
Spaces and nonalphanumeric characters such as punctuation are treated as separators. 
Q
Quarter
Syntax  QUARTER(date)

Output  Integer 
Definition  Returns the quarter of the given <date> as an integer. 
Example  QUARTER(#19860325#) = 1 
Notes  See also DAY ,
WEEK , MONTH , YEAR , and the ISO equivalents 
R
RADIANS
Syntax  RADIANS(number)

Output  Number (angle in radians) 
Definition  Converts the given <number> from degrees to radians. 
Example  RADIANS(180) = 3.14159 
Notes  The inverse function, DEGREES , takes an angle in radians and returns the angle in degrees. 
RANK Table Calculation functions
For more information, see Table Calculation Functions(Link opens in a new window).
RANK(expression, ['asc'  'desc'])
RANK_DENSE(expression, ['asc'  'desc'])
RANK_MODIFIED(expression, ['asc'  'desc'])
RANK_PERCENTILE(expression, ['asc'  'desc'])
RANK_UNIQUE(expression, ['asc'  'desc'])
RAWSQL functions
For more information, see PassThrough Functions (RAWSQL)(Link opens in a new window).
RAWSQL_BOOL("sql_expr", [arg1], … [argN])
RAWSQL_DATE("sql_expr", [arg1], … [argN])
RAWSQL_DATETIME("sql_expr", [arg1], … [argN])
RAWSQL_INT("sql_expr", [arg1], … [argN])
RAWSQL_REAL("sql_expr", [arg1], … [argN])
RAWSQL_SPATIAL
RAWSQL_STR("sql_expr", [arg1], … [argN])
RAWSQLAGG_BOOL("sql_expr", [arg1], … [argN])
RAWSQLAGG_DATE("sql_expr", [arg1], … [argN])
RAWSQLAGG_DATETIME("sql_expr", [arg1], … [argN])
RAWSQLAGG_INT("sql_expr", [arg1], … [argN])
RAWSQLAGG_REAL("sql_expr", [arg1], … [argN])
RAWSQLAGG_STR("sql_expr", [arg1], … [argN])
REGEXP functions
For more information, see Additional Functions(Link opens in a new window).
REGEXP_EXTRACT(string, pattern)
REGEXP_EXTRACT_NTH(string, pattern, index)
REGEXP_EXTRACT_NTH(string, pattern, index)
REGEXP_MATCH(string, pattern)
REGEXP_REPLACE(string, pattern, replacement)
REPLACE
Syntax  REPLACE(string, substring, replacement

Output  String 
Definition  Searches <string> for <substring> and replaces it with <replacement> . If <substring> is not found, the string is not changed. 
Example  REPLACE("Version 3.8", "3.8", "4x") = "Version 4x" 
Notes  See also REGEXP_REPLACE in the additional functions documentation(Link opens in a new window). 
RIGHT
Syntax  RIGHT(string, number)

Output  String 
Definition  Returns the rightmost <number> of characters in the string. 
Example  RIGHT("Calculation", 4) = "tion" 
Notes  See also LEFT and MID. 
ROUND
Syntax  ROUND(number, [decimals])

Output  Number 
Definition 
Rounds the The optional 
Example  ROUND(1/3, 2) = 0.33 
Notes 
Some databases, such as SQL Server, allow specification of a negative length, where 1 rounds number to the tens place, 2 rounds to the hundreds place, and so on. This is not true of all databases. For example, it is not true of Excel or Access. Tip: Because ROUND may run into issues due to the underlying floating point representation of numbers—such as 9.405 rounding to 9.40—it may be preferable to format the number to the desired number of decimal points rather than rounding. Formatting 9.405 to two decimal places will yield the expected 9.41. 
RTRIM
Syntax  RTRIM(string)

Output  String 
Definition  Returns the provided <string> with any trailing spaces removed. 
Example  RTRIM(" Calculation ") = " Calculation" 
Notes  See also LTRIM and TRIM. 
RTRIM_THIS
RTRIM_THIS(string, string)
Only supported when connected to Google BigQuery. For more information, see Additional Functions(Link opens in a new window).
RUNNING Table Calculation functions
For more information, see Table Calculation Functions(Link opens in a new window).
RUNNING_AVG(expression)
RUNNING_COUNT(expression)
RUNNING_MAX(expression)
RUNNING_MIN(expression)
RUNNING_SUM(expression)
S
SCRIPT Analytics Extensions
For more information, see Table Calculation Functions(Link opens in a new window).
SCRIPT_BOOL
SCRIPT_INT
SCRIPT_REAL
SCRIPT_STR
SHAPETYPE
Syntax  SHAPETYPE(<geometry>)

Output  String 
Definition  Returns a string describing the structure of the spatial geometry, such as Empty, Point, MultiPoint, LineString, MultiLinestring, Polygon, MultiPolygon, Mixed, and unsupported 
Example  SHAPETYPE(MAKEPOINT(48.5, 123.1)) = "Point" 
SIGN
Syntax  SIGN(number)

Output  1, 0, or 1 
Definition  Returns the sign of a <number> : The possible return values are 1 if the number is negative, 0 if the number is zero, or 1 if the number is positive. 
Example  SIGN(AVG(Profit)) = 1 
Notes  See also ABS . 
SIN
Syntax  SIN(number)

Output  Number 
Definition  Returns the sine of an angle in radians. 
Example  SIN(0) = 1.0 
Notes 
The inverse function, See also 
SIZE
SIZE()
For more information, see Table Calculation Functions(Link opens in a new window).
SPACE
Syntax  SPACE(number)

Output  String (specifically, just spaces) 
Definition  Returns a string that is composed of the specified number of repeated spaces. 
Example  SPACE(2) = " " 
SPLIT
Syntax  SPLIT(string, delimiter, token number)

Output  String 
Definition  Returns a substring from a <string> , using a <delimiter> character to divide the string into a sequence of <tokens> . 
Example  SPLIT ("abcd", "", 2) = "b" SPLIT ("abcd", "", 2) = "c" 
Notes 
The string is interpreted as an alternating sequence of delimiters and tokens. So for the string
See also supported REGEX in the additional functions documentation(Link opens in a new window). 
Database limitations 
The split and custom split commands are available for the following data sources types: Tableau data extracts, Microsoft Excel, Text File, PDF File, Salesforce, OData, Microsoft Azure Market Place, Google Analytics, Vertica, Oracle, MySQL, PostgreSQL, Teradata, Amazon Redshift, Aster Data, Google Big Query, Cloudera Hadoop Hive, Hortonworks Hive, and Microsoft SQL Server. Some data sources impose limits on splitting strings. See SPLIT function limitations later in this topic. 
SQRT
Syntax  SQRT(number)

Output  Number 
Definition  Returns the square root of a <number> . 
Example  SQRT(25) = 5 
Notes  See also SQUARE . 
SQUARE
Syntax  SQUARE(number)

Output  Number 
Definition  Returns the square of a <number> . 
Example  SQUARE(5) = 25 
Notes  See also SQRT and POWER . 
STARTSWITH
Syntax  STARTSWITH(string, substring)

Output  Boolean 
Definition  Returns true if string starts with substring . Leading white spaces are ignored. 
Example  STARTSWITH("Matador, "Ma") = TRUE 
Notes  See also CONTAINS, as well as supported REGEX in the additional functions documentation(Link opens in a new window). 
STDEV
Syntax  STDEV(expression)

Definition  Returns the statistical standard deviation of all values in the given <expression> based on a sample of the population. 
STDEVP
Syntax  STDEVP(expression)

Definition  Returns the statistical standard deviation of all values in the given <expression> based on a biased population. 
STR
Syntax  STR(expression)

Output  String 
Definition  Casts its argument as a string. 
Example  STR([ID]) 
SUM
Syntax  SUM(expression)

Definition  Returns the sum of all values in the <expression> . Null values are ignored. 
Notes  SUM can only be used with numeric fields. 
T
TAN
Syntax  TAN(number)
The 
Output  Number 
Definition  Returns the tangent of an angle. 
Example  TAN(PI ( )/4) = 1.0 
Notes  See also ATAN , ATAN2 ,COT , and PI . To convert an angle from degrees to radians, use RADIANS . 
THEN
Syntax  IF <test1> THEN <then1>

Definition  A required part of an IF , ELSEIF , or CASE expression, used to define what result to return if a specific value or test is true. 
Example  IF [Season] = "Summer" THEN 'Sandals' "If Season = Summer, then return Sandals. If not, look at the next expression. If Season = Winter, then return Boots. If neither of the expressions are true, return Sneakers." CASE [Season] "Look at the Season field. If the value is Summer, then return Sandals. If the value is Winter, then return Boots. If none of the options in the calculation match what is in the Season field, return a Sneakers." 
Notes 
TIMESTAMP_TO_USEC
TIMESTAMP_TO_USEC(expression)
Only supported when connected to Google BigQuery. For more information, see Additional Functions(Link opens in a new window).
TLD
TLD(string_url)
Only supported when connected to Google BigQuery. For more information, see Additional Functions(Link opens in a new window).
TODAY
Syntax  TODAY()

Output  Date 
Definition  Returns the current local system date. 
Example  TODAY() = 19860325 
Notes 
See also If the data source is a live connection, the system date could be in another timezone. For more information on how to address this, see the Knowledge Base. 
TOTAL
TOTAL(expression)
For more information, see Table Calculation Functions(Link opens in a new window).
TRIM
Syntax  TRIM(string)

Output  String 
Definition  Returns the provided <string> with leading and trailing spaces removed. 
Example  TRIM(" Calculation ") = "Calculation" 
Notes  See also LTRIM and RTRIM. 
U
UPPER
Syntax  UPPER(string)

Output  String 
Definition  Returns the provided <string> in all uppercase characters. 
Example  UPPER("Calculation") = "CALCULATION" 
Notes  See also PROPER and LOWER. 
USEC_TO_TIMESTAMP
USEC_TO_TIMESTAMP(expression)
Only supported when connected to Google BigQuery. For more information, see Additional Functions(Link opens in a new window).
USERDOMAIN
Syntax  USERDOMAIN( )

Output  String 
Definition  Returns the domain for the current user . 
Notes 
This function checks:

USERNAME
Syntax  USERNAME( )

Output  String 
Definition  Returns the username for the current user. 
Example  USERNAME( ) This returns the username of the signed in user, such as "hmyrer". [Manager] = USERNAME( ) If manager "hmyrer" is signed in, this example returns TRUE only if the Manager field in the view contains "hmyrer". 
Notes 
This function checks:
User filters When used as a filter, a calculated field such as 
USER ATTRIBUTE JSON web token functions
USERATTRIBUTE('attribute_name')
USERATTRIBUTEINCLUDES('attribute_name', 'expected_value')
For more information, see User Functions(Link opens in a new window).
V
VAR
Syntax  VAR(expression)

Definition  Returns the statistical variance of all values in the given expression based on a sample of the population. 
VARP
Syntax  VARP(expression)

Definition  Returns the statistical variance of all values in the given expression on the entire population. 
W
WEEK
Syntax  WEEK(date)

Output  Integer 
Definition  Returns the week of the given <date> as an integer. 
Example  WEEK(#19860325#) = 13 
Notes  See also DAY , MONTH , Quarter , YEAR , and the ISO equivalents 
WHEN
Syntax  CASE <expression>

Definition  A required part of a CASE expression. Finds the first <value> that matches <expression> and returns the corresponding <then> . 
Example  CASE [Season] "Look at the Season field. If the value is Summer, then return Sandals. If the value is Winter, then return Boots. If none of the options in the calculation match what is in the Season field, return a Sneakers." 
Notes 
Used with CASE, THEN, ELSE, and END.
CASE <expression> The values that 
Window Table Calcs
For more information, see Table Calculation Functions(Link opens in a new window).
WINDOW_AVG(expression, [start, end])
WINDOW_CORR(expression1, expression2, [start, end])
WINDOW_COUNT(expression, [start, end])
WINDOW_COVAR(expression1, expression2, [start, end])
WINDOW_COVARP(expression1, expression2, [start, end])
WINDOW_MAX(expression, [start, end])
WINDOW_MEDIAN(expression, [start, end])
WINDOW_MIN(expression, [start, end])
WINDOW_PERCENTILE(expression, number, [start, end])
WINDOW_STDEV(expression, [start, end])
WINDOW_STDEVP(expression, [start, end])
WINDOW_SUM(expression, [start, end])
WINDOW_VAR(expression, [start, end])
WINDOW_VARP(expression, [start, end])
X
XPATH functions.
Only supported when connected to Hadoop Hive. For more information, see PassThrough Functions (RAWSQL)(Link opens in a new window).
XPATH_BOOLEAN(XML string, XPath expression string)
XPATH_DOUBLE(XML string, XPath expression string)
XPATH_FLOAT(XML string, XPath expression string)
XPATH_INT(XML string, XPath expression string)
XPATH_LONG(XML string, XPath expression string)
XPATH_SHORT(XML string, XPath expression string)
XPATH_STRING(XML string, XPath expression string)
Y
YEAR
Syntax  YEAR(date)

Output  Integer 
Definition  Returns the year of the given <date> as an integer. 
Example  YEAR(#19860325#) = 1,986 
Notes  See also DAY , WEEK , MONTH , Quarter , and the ISO equivalents 
Z
ZN
Syntax  ZN(expression)

Output  Depends on the data type of the <expression> , or 0. 
Definition  Returns <expression> if it isn't null, otherwise returns zero. 
Example  ZN([Test Grade]) "If the test grade isn't null, return its value. If the test grade is null, return 0." 
Notes 
See also ISNULL. 