How does the INTERSECT Function (DAX) work?

INTERSECT Function (DAX) compares two tables and find common rows. The INTERSECT function outputs a table with similar rows.

INTERSECT Formula Syntax

INTERSECT (<table_expression1>, <table_expression2>)

How do you use the INTERSECT function?

It returns the row intersection of two tables, retaining the duplicates.

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Considerations when using the INTERSECT function

• Intersect is not commutative. That means, Intersect (T1, T2) can have a different result set than Intersect (T2, T1).
• Duplicate rows are retained. That means, if a row appears in table_expression1 and table_expression2, it and all duplicates in table_expression_1 are included in the result set.
• The column names will match the column names in table_expression1.
• Columns are compared based on the positioning, and data comparison with no type coercion.
• The returned table does not include columns from the tables related to table_expression1.

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Formula examples using the INTERSECT function

= SUMX (INTERSECT (SalesOldData,SalesNewData),[Sales Amount]) 

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