ORA-00979 : not a GROUP BY expression
Cause : The GROUP BY clause does not contain all the expressions in the SELECT clause. SELECT expressions that are not included in a group function, such as AVG, COUNT, MAX, MIN, SUM, STDDEV, or VARIANCE, must be listed in the GROUP BY clause.
Action : Include in the GROUP BY clause all SELECT expressions that are not group function arguments.
Popularity: 3% [?]
