代号_飞鹰

Every day, out in the various discussion boards devoted to Microsoft SQL Server, the same types of questions come up repeatedly: • Why is this query r

TheSQLServerQueryOptimizerisacost-basedoptimizer.Itanalyzesanumberofcandidateexecutionplansforagivenquery,estimatesthecostofeachoftheseplans,andselect

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