Symptoms

When you execute a query that contains many COUNT DISTINCT operations in Microsoft SQL Server 2016, an access violation might occur.

Resolution

This problem was fixed in the following cumulative updates for SQL Server:

Cumulative Update 2 for SQL Server 2016

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:


Latest cumulative update for SQL Server 2016

Workaround

To work around this issue, break the query into multiple small queries.

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References

Learn about the terminology Microsoft uses to describe software updates.

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