GROUPING SETS group_by_spec
Syntax Elements
-
group_by_spec
-
{ ordinary_grouping_set |
empty_grouping_set |
rollup_list |
cube_list |
grouping_sets_specification
}
-
ordinary_grouping_set
- One or more expressions used to group cubed report rows across multiple dimensions.
- All ordinary grouping sets must make explicit column references. You cannot specify column positions with GROUPING SETS.
- You cannot specify more than 190 columns in the ordinary grouping sets.
- You cannot reference columns that have a BLOB or CLOB data type unless they are first CAST to another type or passed to a function whose result is not a LOB. For example, casting a BLOB to a BYTE or VARBYTE type, or casting a CLOB to a CHARACTER or VARCHAR type.
- The expression cannot group result rows that have a BLOB, CLOB, ARRAY, or VARRAY type.
-
empty_grouping_set
- A contiguous LEFT PARENTHESIS, RIGHT PARENTHESIS pair with no argument. This syntax is used to provide a grand total.
- The term grand total here refers to a summation of all the individual group totals, not a summation of the nonaggregate data.
-
rollup_list
- A standard grouping expression set specified with ROLLUP. If you specify more than one expression, the expression list must be enclosed by parentheses.
- The expression cannot group result rows that have a BLOB, CLOB, ARRAY, or VARRAY type.
- See ROLLUP Option for more information.
-
cube_list
- a standard grouping expression set specified with CUBE. If you specify more than one expression, the expression list must be enclosed by parentheses.
- The expression cannot group result rows that have a BLOB, CLOB, ARRAY, or VARRAY type.
- See CUBE Option for more information.
-
grouping_sets_specification
- Any of the following:
-
ordinary_grouping_setenclosed in parenthesis
-
rollup_list
-
cube_list
-
empty_grouping_set
-
grouping_sets_specification
- There is no limit to the number of nesting levels for grouping sets specifications other than your system configuration.
- You cannot reference columns that have a LOB data type.