DECLARE @tablename varchar(50)
DECLARE @truncatesql varchar(255)
DECLARE TrCun_Cursor CURSOR FOR
select [name] from sysobjects where type = ’U’

OPEN TrCun_Cursor
FETCH TrCun_Cursor INTO 
@tablename
WHILE(@@fetch_status = 0)
BEGIN
SET @truncatesql = ’truncate table ’ + @tablename
--exec(@truncatesql) --当要删除时，就去掉--
PRINT @truncatesql
FETCH TrCun_Cursor INTO @tablename
END
CLOSE TrCun_Cursor
DEALLOCATE TrCun_Cursor

EXEC sp_MSforeachtable "truncate table ?"