SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
CREATE TABLE #FragmentedIndexes
(
 DatabaseName SYSNAME,SchemaName SYSNAME,TableName SYSNAME,IndexName SYSNAME,[Fragmentation%] FLOAT
)

INSERT INTO #FragmentedIndexes
SELECT
 DB_NAME(DB_ID()) AS DatabaseName,ss.name AS SchemaName,OBJECT_NAME (s.object_id) AS TableName,i.name AS IndexName,s.avg_fragmentation_in_percent AS [Fragmentation%]
FROM sys.dm_db_index_physical_stats(db_id(),NULL,'SAMPLED') s
INNER JOIN sys.indexes i ON s.[object_id] = i.[object_id]
AND s.index_id = i.index_id
INNER JOIN sys.objects o ON s.object_id = o.object_id
INNER JOIN sys.schemas ss ON ss.[schema_id] = o.[schema_id]
WHERE s.database_id = DB_ID()
AND i.index_id != 0
AND s.record_count > 0
AND o.is_ms_shipped = 0
DECLARE @RebuildIndexessql NVARCHAR(MAX)
SET @RebuildIndexessql = ''
SELECT
 @RebuildIndexessql = @RebuildIndexessql +
CASE
 WHEN [Fragmentation%] > 30
   THEN CHAR(10) + 'ALTER INDEX ' + QUOTENAME(IndexName) + ' ON '
      + QUOTENAME(SchemaName) + '.'
      + QUOTENAME(TableName) + ' REBUILD;'
 WHEN [Fragmentation%] > 10
    THEN CHAR(10) + 'ALTER INDEX ' + QUOTENAME(IndexName) + ' ON '
    + QUOTENAME(SchemaName) + '.'
    + QUOTENAME(TableName) + ' REORGANIZE;'
END
FROM #FragmentedIndexes
WHERE [Fragmentation%] > 10
DECLARE @StartOffset INT
DECLARE @Length INT
SET @StartOffset = 0
SET @Length = 4000
WHILE (@StartOffset < LEN(@RebuildIndexessql))
BEGIN
 PRINT SUBSTRING(@RebuildIndexessql,@StartOffset,@Length)
 SET @StartOffset = @StartOffset + @Length
END
PRINT SUBSTRING(@RebuildIndexessql,@Length)
EXECUTE sp_executesql @RebuildIndexessql
DROP TABLE #FragmentedIndexes

还要记住,这个脚本可以运行一段时间,并阻止访问你的表.除非有企业版sql可以在重建索引时锁定表.这将使用索引阻止对该表的所有查询,直到索引碎片整理完成.因此,不建议在维护窗口期间在运行时间内运行索引重建.如果您正在运行企业版,您可以使用ONLINE = ON选项来在线整理索引.这将使用更多的空间,但在碎片整理操作期间不会阻止/锁定您的表.

如果您需要更多信息,请发出提示.

更新：

如果您在较小的数据库上运行此查询,则可以在调用sys.dm_db_index_physical_stats时使用’DETAILED’参数.这可能是对这些指标的更详细的检查.评论中的讨论还将指出,在更大的表格上,可能值得进行SAMPLED扫描,因为这将有助于减少进行索引扫描所需的时间.