GROUPING (Transact-SQL)
Is an aggregate function that causes an additional column to be output with a value of 1 when the row is added by either the CUBE or ROLLUP operator, or 0 when the row is not the result of CUBE or ROLLUP.
Grouping is allowed only in the select list associated with a GROUP BY clause that contains either the CUBE or ROLLUP operator.
Transact-SQL Syntax Conventions
The following example groups SalesQuota and aggregates SaleYTD amounts. The GROUPING function is applied to the SalesQuota column.
USE AdventureWorks; GO SELECT SalesQuota, SUM(SalesYTD) 'TotalSalesYTD', GROUPING(SalesQuota) AS 'Grouping' FROM Sales.SalesPerson GROUP BY SalesQuota WITH ROLLUP; GO
The result set shows two null values under SalesQuota. The first NULL represents the group of null values from this column in the table. The second NULL is in the summary row added by the ROLLUP operation. The summary row shows the TotalSalesYTD amounts for all SalesQuota groups and is indicated by 1 in the Grouping column.
Here is the result set.
SalesQuota TotalSalesYTD Grouping --------- ------------- -------- NULL 1533087.5999 0 250000.00 33461260.59 0 300000.00 9299677.9445 0 NULL 44294026.1344 1 (4 row(s) affected)
Change History
| Release | History |
|---|---|
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12 December 2006 |
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Reference
Aggregate Functions (Transact-SQL)SELECT (Transact-SQL)
