SQL Server 和 Azure SQL 数据库的语法。 syntaxsql UPDATESTATISTICStable_or_indexed_view_name[ { {index_or_statistics__name} | ( {index_or_statistics_name} [ , ...n ] ) } ] [WITH[FULLSCAN[ [ , ]PERSIST_SAMPLE_PERCENT= {ON|OFF} ] |SAMPLEnumber {PERCENT|ROWS} [ [ , ]PERSIST_SA...
UPDATE STATISTICS [ schema_name . ] table_name [ ( { statistics_name | index_name } ) ] [ WITH { FULLSCAN | SAMPLE number PERCENT | RESAMPLE } ] [;] Microsoft Fabric 的语法。 syntaxsql 复制 UPDATE STATISTICS [ schema_name . ] table_name [ ( { statistics_name } ) ...
步骤1:打开SQL Server Management Studio 首先,打开SQL Server Management Studio并连接到你的数据库服务器。 步骤2:选择需要更新统计信息的数据库 在Object Explorer中,展开你的数据库,然后右键单击数据库名称,选择"New Query"。 步骤3:执行Update Statistics命令 在查询窗口中,输入以下命令来更新数据库中所有表的统计...
All instances of UPDATE STATISTICS use the same clause, but different table_name or view_name values. For more information, see CREATE STATISTICS (Transact-SQL) and UPDATE STATISTICS (Transact-SQL).Important The time the task takes to create the Transact-SQL statement that the task runs is ...
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那么SQL Server 2016在更新统计数据时的默认行为是对于大表它会根据表的数据降低这个20%的数字,这样traceflag 2371就没用了。 2)UPDATE STATISTICS 选用SAMPLE是可以并行去取样。 参考: Changes to automatic update statistics in SQL Server – traceflag 2371 What's New in Database Engine...
Applies to: SQL ServerUse the Update Statistics Task dialog to update Microsoft SQL Server information about the data in the tables and indexes. This task resamples the distribution statistics of each index created on user tables in the database. The distribution statistics are used by ...
CREATE DATABASE (SQL Server Compact) CREATE INDEX (SQL Server Compact) CREATE STATISTICS (SQL Server Compact) CREATE TABLE (SQL Server Compact) DATALENGTH (SQL Server Compact) DATEADD (SQL Server Compact) DATEDIFF (SQL Server Compact) DATENAME (SQL Server Compact) DATEPART (SQL Server Compact) ...
首先,我们看看p1的执行计划。怎么看呢?可以执行set statistics profile on,这句就可以了。下面是p1的执行计划 SELECT c2, c3 FROM t1 WHERE c2 BETWEEN @p1 AND @p1+1 |--Nested Loops(Inner Join, OUTER REFERENCES:([Uniq1002], [t1].[c1])) ...
In SQL Server 2008 R2 SP1 and in the next release of SQL Server, we released a trace flag which will change the fixed rate of the 20% threshold for update statistics into a dynamic percentage rate. The higher the number of rows in a table, the lower the threshold...