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SQL Server 2019 Transact-SQL optimization tips (Part 2)

SQL Server 2019 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. Consider using a MAXDOP option…...

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