If the Assigned room field is null, return TBD instead."Ĭompare with ISNULL. "If the Assigned Room field isn't null, return its value. Returns if it's non-null, otherwise returns. If neither of the expressions are true, return Sneakers." "If Season = Summer, then return Sandals. Tests a series of expressions and returns the value for the first true. Used with CASE, WHEN, IF, ELSEIF, THEN, and ELSE. If neither of the expressions are true, return Sneakers." CASE Unlike ELSE, ELSEIF requires a condition (such as = "Winter"). ELSEIF is optional and can be repeated multiple times. In a calculation where ELSE is not specified, if none of the are true, the overall calculation will return null.ĮLSE does not require a condition (such as = "Winter") and can be thought of as a form of null handling.Īn optional piece of an IF expression used to specify additional conditions beyond the initial IF.ĮLSEIF = "Spring" THEN 'Sneakers'ĮLSEIF = "Autumn" THEN 'Sneakers'ĮLSEIF can be thought of as additional IF clauses. Used with CASE, WHEN, IF, ELSEIF, THEN, and ENDĮLSE is optional with CASE and IF. You may want to test which is more performant for your scenario.Īn optional piece of an IF or CASE expression used to specify a default value to return if none of the tested expressions are true. 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. If none of the options in the calculation match what is in the Season field, return a Sneakers." If the value is Winter, then return Boots. If the value is Summer, then return Sandals. If there is no default and no values match, then Null is returned. If no match is found, the (optional) default is returned. When a value that matches expression is encountered, CASE returns the corresponding return. This can be helpful if the second expression results in an error when the first expression is FALSE, because the second expression in this case is never evaluated.Įvaluates the expression and compares it to the specified options (, , etc.). This means that if the first expression is evaluated to be FALSE, then the second expression is not evaluated at all. Note: The AND operator employs short circuit evaluation. If you would like to change this, use the Format area in the format dialog. If you create a calculation in which the result of an AND comparison is displayed on a worksheet, Tableau displays TRUE and FALSE. If either expression is NULL, then the result is NULL. If both expressions are TRUE (that is, not FALSE or NULL), then the result is TRUE. "If both (Season = Spring) and (Season = Fall) are true simultaneously, then return It's the apocalypse and footwear doesn't matter." THEN "It's the apocalypse and footwear doesn't matter" (If both sides are true, the logical test returns true.) Performs a logical conjunction on two expressions. For example, you might want to categorize values based on certain cutoffs.Ī logical calculation might look something like this: IF > 0ĮND Logical functions and operators available in Tableau AND Syntax Logical calculations allow you to determine if a certain condition is true or false (Boolean logic). It also demonstrates how to create a logical calculation using an example. This article introduces logical functions and their uses in Tableau.
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