sql server创建临时表的两种写法和删除临时表

--第一种方式 
create table #tmp(name varchar(255),id int)
--第二种方式
select count(id) as storyNum ,
sum(convert(numeric(10,2),case when isnumeric(code)=1 then code else 0 end)) as codeNum,
sum((case when isnumeric(realcode)=1 then convert(numeric(10,2),realcode) else 0.0 end)) as realcodeNum,
tdtname,cycle,jiracomponent,jirastatename,qualityvalue,storycodellt 
into #tmp from IKNOW_STORY_U2000V1R7C00 group by tdtname,cycle,jiracomponent,jirastatename,qualityvalue,storycodellt
--查询临时表
select * from #tmp
--删除临时表
if object_id('tempdb..#tmp') is not null
	begin
		drop table #tmp 
	end 

--错误的临时表删除操作，因为所在数据库不同
IF EXISTS (SELECT * FROM sysobjects WHERE object_id = OBJECT_ID(N'[dbo].[#tempTable]') AND type in (N'U'))
 Begin
 DROP TABLE [dbo].[tempTable]
End
 --错误的临时表删除操作,因为临时表名已变
if exists (select * from tempdb.dbo.sysobjects where id = object_id(N'[#temptable]'))
Begin
 drop table #temptable
End

--正确的临时表删除操作
if object_id('tempdb..#tempTable') is not null Begin
 drop table #tempTable
End

IF Object_id('Tempdb..#dl') IS NOT NULL  
DROP TABLE #dl --如果有存在就删除临时表
CREATE TABLE #dl (neirong char(20),icount int, dlzonjine int, dlshu int, dlyin int) --重建临时表
INSERT INTO #dl SELECT * FROM tab1 --把物理表的数据插到临时表