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How Can I Overcome SQL Server's IN Clause Value Limit?

Patricia Arquette

Dec 29, 2024 am 09:00 AM

How Can I Overcome SQL Server's IN Clause Value Limit?

Overcoming the "IN" Clause Value Limit in SQL Server

In SQL Server's IN clause, the number of values that can be listed in a comma-separated expression for matching is not infinite. Microsoft's documentation states that this limit falls within "the thousands."

To address this limitation, storing the values in a separate table and utilizing a SELECT subquery within the IN clause is recommended. This strategy avoids memory consumption and potential errors 8623 or 8632.

These errors indicate that the query has exceeded the internal resource limit. Error 8623 is typically encountered with intricate queries or those involving numerous tables or partitions.

Meanwhile, error 8632 suggests a high level of expression complexity. Revising the query to simplify expressions may resolve this issue. By implementing these strategies, developers can effectively navigate the "IN" clause limitations and optimize SQL Server performance.

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