Ian Jose's WebLog

This weblog is intended to help T-SQL developers get the best performing query plans from SQL Server. Some of the posts describe simple mistakes that can be easily avoided. Other posts describe complex solutions to limitations in SQL Server. Lastly, so
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  • Ian Jose's WebLog

    Disabling Constant-Constant Comparison Estimation

    Posted over 7 years ago
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    SQL Server 8.0 did not perform cardinality estimates based on the comparion of two constants. Instead, SQL Server 8.0 guessed at the resulting selectivity. The reasoning for this is that one or more of the constants may be statement parameters, which...
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