清空sql server数据库所有的表记录

declare curTable cursor for select name from sysobjects where xtype='U'
 declare @t_table varchar(100)
 declare @t_sql varchar(200)
 open curTable 
fetch curTable into @t_table
 while @@fetch_status = 0
 begin
 set @t_sql='delete from ' + @t_table
 exec (@t_sql)
 fetch curTable into @t_table
 end
 deallocate curTable