"查查詞典"手機(jī)版
千萬人都在用的超大詞匯詞典翻譯APP
Simple instructs the query optimizer to attempt Simple指示查詢優(yōu)化器嘗試進(jìn)行 Query execution costs are estimated by the query optimizer 由查詢優(yōu)化器估計(jì)查詢執(zhí)行開銷。 How indexes are used by the query optimizer 查詢優(yōu)化器如何使用索引 A compact database engine and a robust query optimizer 壓縮的數(shù)據(jù)庫引擎和強(qiáng)大的查詢優(yōu)化器。 When the sql server query optimizer recognizes a query that matches 當(dāng)sql server查詢優(yōu)化器識別與 This makes sure that the plan guide is used by the query optimizer 這將確保計(jì)劃指南可由查詢優(yōu)化器使用。 Approximate query execution costs are estimated by the query optimizer 由查詢優(yōu)化器估計(jì)查詢執(zhí)行的大致開銷。 The query optimizer treats the view like a table with clustered index 查詢優(yōu)化器將視圖當(dāng)成包含聚集索引的表處理。 The indexed view is used by the query optimizer to produce the query plan 查詢優(yōu)化器使用該索引視圖生成查詢計(jì)劃。 The following example instructs the query optimizer to use the value 下面的示例指示在優(yōu)化查詢時(shí)查詢優(yōu)化器對本地變量
The query optimizer is the component of a database management system that attempts to determine the most efficient way to execute a query. The optimizer considers the possible query plans for a given input query, and attempts to determine which of those plans will be the most efficient.
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