SQL2008R2的 遍历所有表更新统计信息 和 索引重建

【2.以下是更新统计信息】

 DECLARE UpdateStatisticsTables CURSOR READ_ONLY FORSELECT sst.name,Schema_name(sst.schema_id)FROM   sys.tables sstWHERE  sst.TYPE = 'U'DECLARE @name   VARCHAR(80),@schema VARCHAR(40)OPEN UpdateStatisticsTablesFETCH NEXT FROM UpdateStatisticsTables INTO @name, @schemaWHILE ( @@FETCH_STATUS <> -1 )BEGINIF ( @@FETCH_STATUS <> -2 )BEGINDECLARE @sql NVARCHAR(1024)SET @sql='UPDATE STATISTICS ' + Quotename(@schema)+'.' + Quotename(@name)EXEC Sp_executesql @sqlENDFETCH NEXT FROM UpdateStatisticsTables INTO @name, @schemaENDCLOSE UpdateStatisticsTablesDEALLOCATE UpdateStatisticsTablesGO

 

UPDATE STATISTICS tblCompany  -- 表名
USE tblCompany; -- 数据库名
EXEC sp_updatestats -- 更新所有表统计信息

 

 

 

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【1.以下是索引重建】 

 

摘自: http://www.cnblogs.com/shijun/archive/2012/04/21/2461737.html

 

项目升级数据库由SQL2000升级到2008R2，今天对数据库表进行碎片扫描，发现有些表碎片较大，于是决定重建索引，联机帮助是最好的老师，将相关脚本摘录备后查。

参考sys.dm_db_index_physical_stats

 

SELECTOBJECT_NAME(object_id) as objectname,object_id AS objectid,index_id AS indexid,partition_number AS partitionnum,avg_fragmentation_in_percent AS fra
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL , NULL, 'LIMITED')
WHERE avg_fragmentation_in_percent > 10.0 AND index_id > 0;

 

 

使用脚本中的 sys.dm_db_index_physical_stats 重新生成或重新组织索引 （来源于联机帮助）

 

SET NOCOUNT ON;
DECLARE @objectid int;
DECLARE @indexid int;
DECLARE @partitioncount bigint;
DECLARE @schemaname nvarchar(130); 
DECLARE @objectname nvarchar(130); 
DECLARE @indexname nvarchar(130); 
DECLARE @partitionnum bigint;
DECLARE @partitions bigint;
DECLARE @frag float;
DECLARE @command nvarchar(4000); 
-- Conditionally select tables and indexes from the sys.dm_db_index_physical_stats function 
-- and convert object and index IDs to names.
SELECTobject_id AS objectid,index_id AS indexid,partition_number AS partitionnum,avg_fragmentation_in_percent AS frag
INTO #work_to_do
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL , NULL, 'LIMITED')
WHERE avg_fragmentation_in_percent > 10.0 AND index_id > 0;-- Declare the cursor for the list of partitions to be processed.
DECLARE partitions CURSOR FOR SELECT * FROM #work_to_do;-- Open the cursor.
OPEN partitions;-- Loop through the partitions.
WHILE (1=1)BEGIN;FETCH NEXTFROM partitionsINTO @objectid, @indexid, @partitionnum, @frag;IF @@FETCH_STATUS < 0 BREAK;SELECT @objectname = QUOTENAME(o.name), @schemaname = QUOTENAME(s.name)FROM sys.objects AS oJOIN sys.schemas as s ON s.schema_id = o.schema_idWHERE o.object_id = @objectid;SELECT @indexname = QUOTENAME(name)FROM sys.indexesWHERE  object_id = @objectid AND index_id = @indexid;SELECT @partitioncount = count (*)FROM sys.partitionsWHERE object_id = @objectid AND index_id = @indexid;-- 30 is an arbitrary decision point at which to switch between reorganizing and rebuilding.IF @frag < 30.0SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REORGANIZE';IF @frag >= 30.0SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REBUILD';IF @partitioncount > 1SET @command = @command + N' PARTITION=' + CAST(@partitionnum AS nvarchar(10));EXEC (@command);PRINT N'Executed: ' + @command;END;-- Close and deallocate the cursor.
CLOSE partitions;
DEALLOCATE partitions;-- Drop the temporary table.
DROP TABLE #work_to_do;
GO