COLUMN DAX Statement


The COLUMN keyword introduces a table column (DEFINE) in a query (also known as query column).
The syntax after COLUMN defines a query column, which has a data lineage and it is populated in an empty filter context before the query is executed.
The following example shows using a query column in a DAX query.

DEFINE
    COLUMN Customer[First Letter] =
        LEFT ( Customer[Name], 1 )
EVALUATE
SUMMARIZECOLUMNS (
    Customer[First Letter],
    "Sales Amount", [Sales Amount]
)
ORDER BY Customer[First Letter]

Last update: Jan 2, 2021   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo

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Context Transition

This function performs a Context Transition if called in a Row Context. Click to read more.

Row Context

This expression is executed in a Row Context. Click to read more.

Iterator

Not recommended

The use of this function is not recommended. See Remarks and Related functions for alternatives.

Not recommended

The use of this parameter is not recommended.

Deprecated

This function is deprecated. Jump to the Alternatives section to see the function to use.

Deprecated

This parameter is deprecated and its use is not recommended.

DirectQuery compatibility

Limitations are placed on DAX expressions allowed in measures and calculated columns.
The state below shows the DirectQuery compatibility of the DAX function.

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