What are the DAX Statements in power bi

This recipe explains what are the DAX Statements in power bi

Recipe Objective - What are the DAX Statements in Power BI?

Data Analysis Expressions (DAX) is a library of functions and operators combined to build formulas and expressions in Power BI, Analysis Services, and Power Pivot in Excel data models.

This category consists of the following statements:

DEFINE - (Keyword) Defines entities that exist only for the duration of a DAX query.

EVALUATE - (Keyword) A statement required to execute a DAX query.

ORDER BY - (Keyword) Defines one or more expressions used to sort results of a DAX query.

VAR (Keyword) Stores the result of an expression as a named variable, which can then be passed as an argument to other measure expressions.

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Syntax of DEFINE -

DEFINE { (entity) [name] = (expression) }

Parameters -

entity - MEASURE, VAR, TABLE, or COLUMN.

name - The name of an entity. It cannot be an expression.

expression - Any DAX expression that returns a single scalar value. The expression can use any of the defined entities. The expression must return a table. If a scalar value is required, wrap the scalar inside a ROW() function to produce a table.

Syntax of EVALUATE -

EVALUATE [table]

Parameters -

table - A table expression

It returns the result of a table expression.

Syntax of VAR -

VAR (name) = (expression)

Parameters -

name - The name of the variable (identifier).

It returns a named variable containing the result of the expression argument.

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