MySQL 8.0: GROUPING function

MySQL 8.0: GROUPING function

Starting with MySQL 8.0.1, the server supports the SQL GROUPING function.  The GROUPING function is used to distinguish between a NULL representing the set of all values in a super-aggregate row  (produced by a ROLLUP operation) from a NULL in a regular row.…

Source: MySQL 8.0: GROUPING function

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