Tuesday, 3 September 2013

Script to Compress Tables and Indexes

This script is for SQL Server 2008 Enterprise Edition. Run the script in SSMS with "results to text". It will generate the compression statements for all tables and indexes for the database it which is run in. It creates the compression scripts in ascending order based on table/index size so smaller tables/indexes are compressed first creating additional space for larger tables/indexes to be compressed.
--Creates the ALTER TABLE Statements

SET NOCOUNT ON
SELECT 'ALTER TABLE ' + '[' + s.[name] + ']'+'.' + '[' + o.[name] + ']' + ' REBUILD WITH (DATA_COMPRESSION=PAGE);'
FROM sys.objects AS o WITH (NOLOCK)
INNER JOIN sys.indexes AS i WITH (NOLOCK)
ON o.[object_id] = i.[object_id]
INNER JOIN sys.schemas AS s WITH (NOLOCK)
ON o.[schema_id] = s.[schema_id]
INNER JOIN sys.dm_db_partition_stats AS ps WITH (NOLOCK)
ON i.[object_id] = ps.[object_id]
AND ps.[index_id] = i.[index_id]
WHERE o.[type] = 'U'
ORDER BY ps.[reserved_page_count]




--Creates the ALTER INDEX Statements

SET NOCOUNT ON
SELECT 'ALTER INDEX '+ '[' + i.[name] + ']' + ' ON ' + '[' + s.[name] + ']' + '.' + '[' + o.[name] + ']' + ' REBUILD WITH (DATA_COMPRESSION=PAGE);'
FROM sys.objects AS o WITH (NOLOCK)
INNER JOIN sys.indexes AS i WITH (NOLOCK)
ON o.[object_id] = i.[object_id]
INNER JOIN sys.schemas s WITH (NOLOCK)
ON o.[schema_id] = s.[schema_id]
INNER JOIN sys.dm_db_partition_stats AS ps WITH (NOLOCK)
ON i.[object_id] = ps.[object_id]
AND ps.[index_id] = i.[index_id]
WHERE o.type = 'U' AND i.[index_id] >0
ORDER BY ps.[reserved_page_count]


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