SQL 建立临时表和变量表

CREATE table #T (s varchar(128))  
DECLARE @T table (s varchar(128))  
INSERT into #T select 'old value #'  
INSERT into @T select 'old value @'  
BEGIN transaction  
  UPDATE #T set s='new value #'  
  UPDATE @T set s='new value @'  
ROLLBACK transaction  
SELECT * from #T  
SELECT * from @T