EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL' 
GO 
 
EXEC sp_MSForEachTable '
 SET QUOTED_IDENTIFIER ON 
 DELETE FROM ? 
' 
GO 
   
EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL' 
GO 
   
EXEC sp_MSForEachTable '  
IF OBJECTPROPERTY(object_id(''?''), ''TableHasIdentity'') = 1  
DBCC CHECKIDENT (''?'', RESEED, 0)  
'  
GO