How to fix the Oracle error QSM-01251: query rewrite cannot perform rollup due to the presence of a window function?

In this post, you’ll learn more about the Oracle ErrorQSM-01251: query rewrite cannot perform rollup due to the presence of a window function with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-01251: query rewrite cannot perform rollup due to the presence of a window function

Reason for the Error QSM-01251: query rewrite cannot perform rollup due to the presence of a window function

No query rewrite if a window function is present on a column that requires a roll-up to compute a measure.

How to fix the Error QSM-01251: query rewrite cannot perform rollup due to the presence of a window function ?

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

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