Can Group Functions Be Mixed with Non-group Selection Fields?
Submitted by: AdministratorIf a group function is used in the SELECT clause, all other selection fields must be group level fields. Non-group fields can not be mixed with group fields in the SELECT clause. The script below gives you an example of invalid SELECT statements with group and non-gorup selection fields:
SQL> SELECT COUNT(*), department_id FROM departments;
ORA-00937: not a single-group group function
In this example, COUNT(*) is a group field and department_id is a non-group field.
Submitted by: Administrator
SQL> SELECT COUNT(*), department_id FROM departments;
ORA-00937: not a single-group group function
In this example, COUNT(*) is a group field and department_id is a non-group field.
Submitted by: Administrator
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