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SQL Server 数据库引擎可处理对多种数据存储体系结构(例如,本地表、已分区表以及分布在多个服务器上的表)执行的查询。 以下部分介绍了 SQL Server 如何处理查询并通过执行计划缓存来优化查询重用。执行模式SQL Server 数据库引擎可使用两种不同的处理模式处理 Transact-SQL 语句:...
SQL コピー SELECT name FROM mytable WHERE name BETWEEN 'A' AND 'C'; 名前が Adam とDale の値の間にある行の範囲に対応する索引項目にキー範囲ロックが設定され、前のクエリで条件が満たされた新しい行が追加されたり、削除されたりするのを防ぎます。 この範囲の最初の...
You use the Transact-SQL BULK INSERT statement, or the OPENROWSET(BULK) function, or you use one of the Bulk Insert API commands such as .NET SqlBulkCopy, OLEDB Fast Load APIs, or the ODBC Bulk Copy APIs to bulk copy data into a table. The TABLOCK hint is specified or the table lo...
Free space intempdb(not considering free disk space that might be available fortempdbgrowth) Space used by the version store Space used by internal objects Space used by user objects SQLCopy SELECTSUM(unallocated_extent_page_count) *8.0/1024AStempdb_free_data_space_mb,SUM(version_store_reserved...
October 2023 V-Order write optimization V-Order optimizes parquet files to enable lightning-fast reads under the Microsoft Fabric compute engines such as Power BI, SQL, Spark, and others. Warehouse queries in general benefit from faster read times with this optimization, still ensuring the parquet...
SQL Server Transact-SQL Index .NET Framework error occurred during execution of user-defined routine or aggregate "geography" 'IF EXISTS(SELECT COUNT(1))' VS 'IF EXISTS(SELECT 1) ' 'Incorrect syntax near' error while executing dynamic sql 'INSERT EXEC' within a function did not work 'Sort...
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Applies to: SQL Server Analysis Services Azure Analysis Services Fabric/Power BI PremiumThis article summarizes new features, improvements, deprecated and discontinued features, and behavior and breaking changes in the most recent versions of SQL Server Analysis Services (SSAS)....
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