SELECT CASE WHEN (GROUPING(sob.name)=1) THEN 'All_Tables' ELSE ISNULL(sob.name, 'unknown') END AS Table_name, SUM(sys.length) AS Byte_Length FROM sysobjects sob, syscolumns sys WHERE sob.xtype='u' AND sys.id=sob.id GROUP BY sob.name WITH CUBEat http://blog.sqlauthority.com/2006/11/10/sql-server-query-to-find-byte-size/