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EXCEPT

  • Article

Returns the rows of the first table in the expression which do not appear in the second table.

Syntax

EXCEPT(<table_expression1>, <table_expression2>)

Parameters

Term Definition
Table_expression Any DAX expression that returns a table.

Return value

A table that contains the rows of one table minus all the rows of another table.

Remarks

  • If a row appears at all in both tables, it and its duplicates are not present in the result set. If a row appears in only table_expression1, it and its duplicates will appear in the result set.

  • The column names will match the column names in table_expression1.

  • The returned table has lineage based on the columns in table_expression1 , regardless of the lineage of the columns in the second table. For example, if the first column of first table_expression has lineage to the base column C1 in the model, the Except will reduce the rows based on the availability of values in the first column of second table_expression and keep the lineage on base column C1 intact.

  • The two tables must have the same number of columns.

  • Columns are compared based on positioning, and data comparison with no type coercion.

  • The set of rows returned depends on the order of the two expressions.

  • The returned table does not include columns from tables related to table_expression1.

  • This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.

Example

States1

State
A
B
B
B
C
D
D

States2

State
B
C
D
D
D
E
E
E

Except(States1, States2)

State
A

Except(States2, States1)

State
E
E
E