SORT (GROUP BY ROLLUP)

Description

Group rows together based on column values and perform a rollup.

Versions

This operation was introduced in Oracle 8.1.5

This operation is implemented in the following versions

8.1.5
8.1.6
8.1.7
9.0.1
9.2.0
10.1.0
10.2.0

Example

This example was developed using Oracle 9.2.0.1 on Windows 2000

This example requires the following table definition

    CREATE TABLE t1 (c1 NUMBER);

The table does not need to be analysed

The statement

    SELECT c1 FROM t1
    GROUP BY ROLLUP c1;

generates the following execution plan

0     SELECT STATEMENT Optimizer=CHOOSE
1   0   SORT (GROUP BY ROLLUP)
2   1     TABLE ACCESS (FULL) OF 'T1'