SETSTATISTICSTIMEOFF; GO 下面是输出结果: SQL Server parseandcompile time: CPU time=0ms, elapsed time=1ms. SQL Server parseandcompile time: CPU time=0ms, elapsed time=1ms. (269row(s) affected) SQL Server Execution Times: CPU time=0ms, elapsed time=2ms. SQL Server parseandcompile time: CP...
SET STATISTICS TIME { ON | OFF } 备注当SET STATISTICS TIME 为 ON 时,会显示语句的时间统计信息。 为 OFF 时,不显示时间统计信息。SET STATISTICS TIME 的设置是在执行或运行时设置,而不是在分析时设置。Microsoft SQL Server 不能在纤程模式下提供准确的统计信息,而纤程模式在启用“轻型池”配置选项时激活...
运行这个查询后,通过STATISTICS IO, STATISTICS TIME得到的性能指标如下所示: 代码语言:javascript 复制 --clear cache dbcc dropcleanbuffers;--statistics iosetstatistics io on;--statistics timesetstatistics time on; 如果该表包含聚集索引,那么采用的访问方法将会是无序聚集索引扫描(Clustered Index Scan运算符,其O...
The following database options are set or overridden and can't be changed later:NEW_BROKER if the broker isn't enabled in the .bak file. ENABLE_BROKER if the broker isn't enabled in the .bak file. AUTO_CLOSE=OFF if a database in the .bak file has AUTO_CLOSE=ON. RECOVERY FULL ...
LOG ON (NAME=logical_file_name, FILENAME=’os_filename_name’, [,SIZE=size] [,MAXSIZE={max_size︳UNLIMITED}] [,FILEGROWTH=grow_increment]) }[,……n]] [COLLATEcollation_name] 2.使用T-SQL语句管理数据库 (1)打来数据库USEdatabase_name (2)查看数据库信息[EXEC[UTE]]sp_helpdbdatabase_nam...
SET XACT_ABORT ON SET LOCK_TIMEOUT 30000 SET DEADLOCK_PRIORITY LOW DECLARE @err AS INT, @comments AS VARCHAR(100), @retry AS INT, @numretries AS INT SELECT @retry = 0, @numretries = 2 RETRY: BEGIN TRY BEGIN TRAN UPDATE T1 SET col1 = 2 WAITFOR DELAY '00:00:10' SELECT * FROM...
-- 创建一个示例表CREATETABLEExampleTable(IDINTPRIMARYKEY,TimeColumnDATETIME);-- 更新时间列为随机时间UPDATEExampleTableSETTimeColumn=DATEADD(second,ABS(CHECKSUM(NEWID()))%86400,GETDATE()); 在上面的示例中,我们使用DATEADD函数将一个随机的秒数(0到86399之间)添加到当前日期和时间。ABS函数用于获取绝对值...
[ FROM { <table_source> } [ , ...n ] ] <table_source> ::= { table_or_view_name [ FOR SYSTEM_TIME <system_time> ] [ [ AS ] table_alias ] [ <tablesample_clause> ] [ WITH ( < table_hint > [ [ , ] ...n ] ) ] | rowset_function [ [ AS ] table_alias ] [ ( ...
1、SET ANSI_DEFAULTS { ON | OFF } 示例: SET ANSI_DEFAULTS ON; DBCC USEROPTIONS; SET ANSI_DEFAULTS OFF; 1. 2. 3. 设置SET ANSI_DEFAULTS ON 并使用 DBCC USEROPTIONS 语句显示受影响的设置。 2、SET ANSI_NULLS { ON | OFF } T-SQL 支持在与空值进行比较时,允许比较运算符返回 TRUE 或 FALSE...
当SET STATISTICS TIME为ON时,会显示语句的时间统计信息;为OFF时,不显示时间统计信息。 实例4 使用SET STATISTICS TIME命令 本实例将STATISTICS TIME设置为ON,显示查询的统计信息。代码如下: SET STATISTICS TIME ON SELECT * --查询操作 FROM 客户资料