How to fix the Oracle error ORA-30452: cannot compute AVG(X), VARIANCE(X) or STDDEV(X), without COUNT(X) or SUM(X)?

In this post, you’ll learn more about the Oracle ErrorORA-30452: cannot compute AVG(X), VARIANCE(X) or STDDEV(X), without COUNT(X) or SUM(X) with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-30452: cannot compute AVG(X), VARIANCE(X) or STDDEV(X), without COUNT(X) or SUM(X)

Reason for the Error ORA-30452: cannot compute AVG(X), VARIANCE(X) or STDDEV(X), without COUNT(X) or SUM(X)

Incremental refresh of summaries requires a COUNT(X) column in order to incrementally refresh AVG(X). It requires both SUM(X) and COUNT(X) columns in order to in refresh STDDEV(X) or VARIANCE(X)

How to fix the Error ORA-30452: cannot compute AVG(X), VARIANCE(X) or STDDEV(X), without COUNT(X) or SUM(X) ?

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

Make sure that the required columns are part of the summary definition if incremental refresh capability is desired.