How to fix the Oracle error QSM-01601: rollup(s) took place on equivalence, string?

In this post, you’ll learn more about the Oracle ErrorQSM-01601: rollup(s) took place on equivalence, string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-01601: rollup(s) took place on equivalence, string

Reason for the Error QSM-01601: rollup(s) took place on equivalence, string

If query’s GROUP BY has one of the higher levels of columns found in the equivalence, then the lower level columns in the equivalence will be rolled up to compute the desired results.

How to fix the Error QSM-01601: rollup(s) took place on equivalence, string ?

You can fix this error in Oracle by following the below steps

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