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- SQL查詢(xún)的表查詢(xún)優(yōu)化SQL QUERY OPTIMIZATION IN USING THE TABLEAU QUERY
- 下圖說(shuō)明了示例交叉表查詢(xún)的部分結果集This figure illustrates part of the result set for sample crosstab query
- SQL Server 2005 Analysis Services(SSAS)中聲明SQL查詢(xún)的方法已發(fā)生變化。The means of stating SQL queries has changed in SQL Server 2005 Analysis Services (SSAS).
- Web數據庫多表查詢(xún)的關(guān)鍵技術(shù)與優(yōu)化The key technology and optimization of query in Multi table Web Database
- 該視圖使用SQL查詢(xún)進(jìn)行填充。This view is populated by use of SQL queries.
- 對小表進(jìn)行索引可能不會(huì )產(chǎn)生優(yōu)化效果,因為查詢(xún)優(yōu)化器在遍歷用于搜索數據的索引時(shí),花費的時(shí)間可能比執行簡(jiǎn)單的表掃描還長(cháng)。Indexing small tables may not be optimal because it can take the query optimizer longer to traverse the index searching for data than to perform a simple table scan.
- 二元表查詢(xún)?yōu)橐环N有次序的表Data Base Binary Table Search
- 關(guān)系代數運算與SQL查詢(xún)的對應關(guān)系CORRESPONDING RELATION OF THE RELATIONAL ALGEBRA CALCULUS AND SQL QUERY
- 啟動(dòng)自動(dòng)更新過(guò)期統計信息的查詢(xún)將一直等待,直到更新的統計信息可在查詢(xún)優(yōu)化計劃中使用。Queries that initiate an automatic update of out-of-date statistics wait until the updated statistics can be used in the query optimization plan.
- 基于多值邏輯的高速ECL模糊控制表查詢(xún)電路HIGH-SPEED ECL CIRCUIT FOR LOOKING UP FUZZY CONTROL TABLE BASED ON MULTIVALUED LOGIC
- Transact-SQL查詢(xún)的文本,用于選擇作為事件提交的記錄。Is the text of the Transact-SQL query used to select the records to be submitted as events.
- 下面的語(yǔ)句返回值Index,這表示查詢(xún)優(yōu)化程序已探測索引來(lái)估計選擇性。The following statement returns the value Index, which means that the query optimizer probed an index to estimate the selectivity.
- 最終實(shí)現由XQuery查詢(xún)到SQL查詢(xún)的查詢(xún)重寫(xiě).This method can achieve the query rewriting of XQuery to SQL query.
- 多表查詢(xún)通過(guò)匹配公共字段中的值來(lái)組合多個(gè)表中的信息。A multiple table query combines information from more than one table by matching the values in common fields.
- SQL查詢(xún)優(yōu)化SQL query optimization
- 查詢(xún)的類(lèi)型為The query is of type
- 不同光質(zhì)對草莓葉片的表觀(guān)量子效率、化效率及光呼吸速率影響較大。The apparent quantum efficiency( AQY), photorespiratory rate( Pr) and carboxylation efficiency( CE) also were strongly affected by light quality.
- 描述查詢(xún)的結果集Describe Results of a Query
- 子查詢(xún)及其函數執行的次數會(huì )因優(yōu)化器選擇的訪(fǎng)問(wèn)路徑的不同而異。The number of times the subquery and its function is executed can vary with different access paths chosen by the optimizer.
- 收集關(guān)于原始SQL查詢(xún)的統計數據。Collect statistics on your original SQL query.
