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Some useful SQL Server 2017 Transact-SQL optimization tips (Part 2)

Some useful SQL Server 2017 Transact-SQL optimization tips (Part 2) Try to avoid using the DISTINCT clause, whenever possible. The DISTINCT clause should only be used if you know that duplicate returned rows are a possibility. Because using the DISTINCT clause will result in some performance degradation, you should use this clause only when it is necessary. Use table variables…

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