I’m putting this script out here so I don’t need to hunt for it later on. It’s useful and common task people ask about often enough.
Original Blog:
Note, I fixed some bugs in his original script.
-- http://blogs.msdn.com/b/joaol/archive/2008/01/28/script-to-rebuild-and-reorganize-database-indexes-sql-server-2005.aspx /* Depending on fragmentation index level appropriated action will be taken (no action, rebuild or reorganize) If average fragmentation is less than 10% no action will be taken, if average fragmentation is between 10% and 30% index will be reorganized, finally if index average fragmentation is greater than 30% index will be rebuilt. -- Ensure a USE statement has been executed first. */ USE <change_me> go SET nocount ON; go 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); DECLARE @dbid SMALLINT; -- Conditionally select tables and indexes from the sys.dm_db_index_physical_stats function -- and convert object and index IDs to names. if OBJECT_ID('tempdb..#work_to_do') is not null begin drop table #work_to_do end SET @dbid = Db_id(); SELECT [object_id] AS objectid, index_id AS indexid, partition_number AS partitionnum, avg_fragmentation_in_percent AS frag, page_count INTO #work_to_do FROM sys.Dm_db_index_physical_stats (@dbid, NULL, NULL , NULL, N'LIMITED') WHERE avg_fragmentation_in_percent > 10.0 -- Allow limited fragmentation AND index_id > 0 -- Ignore heaps AND page_count > 25; -- Ignore small tables -- Declare the cursor for the list of partitions to be processed. DECLARE partitions CURSOR FOR SELECT objectid, indexid, partitionnum, frag FROM #work_to_do; OPEN partitions FETCH next FROM partitions INTO @objectid, @indexid, @partitionnum, @frag; -- Open the cursor.OPEN partitions; -- Loop through the partitions. WHILE @@FETCH_STATUS = 0 BEGIN IF @@FETCH_STATUS < 0 BREAK; SELECT @objectname = Quotename(o.NAME), @schemaname = Quotename(s.NAME) FROM sys.objects AS o JOIN sys.schemas AS s ON s.schema_id = o.schema_id WHERE o.object_id = @objectid; SELECT @indexname = Quotename(NAME) FROM sys.indexes WHERE object_id = @objectid AND index_id = @indexid; SELECT @partitioncount = Count (*) FROM sys.partitions WHERE object_id = @objectid AND index_id = @indexid; -- 30 is an arbitrary decision point at which to switch between reorganizing and rebuilding. IF @frag < 30.0 SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REORGANIZE'; IF @frag >= 30.0 SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REBUILD'; IF @partitioncount > 1 SET @command = @command + N' PARTITION=' + Cast(@partitionnum AS NVARCHAR(10)); EXEC (@command); PRINT N'Executed: ' + @command; FETCH next FROM partitions INTO @objectid, @indexid, @partitionnum, @frag; END -- Close and deallocate the cursor. CLOSE partitions; DEALLOCATE partitions; -- Drop the temporary table. DROP TABLE #work_to_do; go