SQLSERVER2008 存储过程基本语法
来源:https://www.cnblogs.com/tlduck/p/5462399.html
一、定义变量 --简单赋值 declare @a int set @a=5 print @a
--使用select语句赋值 declare @user1 nvarchar(50) select @user1= ‘张三‘ print @user1 declare @user2 nvarchar(50) select @user2 = Name from ST_User where ID=1 print @user2
--使用update语句赋值 declare @user3 nvarchar(50) update ST_User set @user3 = Name where ID=1 print @user3
二、表、临时表、表变量 --创建临时表1 create table #DU_User1 ( [ID] [ int ] NOT NULL, [Oid] [ int ] NOT NULL, [Login] [nvarchar](50) NOT NULL, [Rtx] [nvarchar](4) NOT NULL, [ Name ] [nvarchar](5) NOT NULL, [ Password ] [nvarchar]( max ) NULL, [State] [nvarchar](8) NOT NULL ); --向临时表1插入一条记录 insert into #DU_User1 (ID,Oid,[Login],Rtx,Name,[ Password ],State) values (100,2,‘LS‘,‘0000‘,‘临时‘,‘321‘,‘特殊‘ );
--从ST_User查询数据,填充至新生成的临时表 select * into #DU_User2 from ST_User where ID<8
--查询并联合两临时表 select * from #DU_User2 where ID<3 union select * from #DU_User1
--删除两临时表 drop table #DU_User1 drop table #DU_User2
--创建临时表 CREATE TABLE #t ( [ID] [ int ] NOT NULL, [State] [nvarchar](8) NOT NULL, )
--将查询结果集(多条数据)插入临时表 insert into #t select * from ST_User
--添加一列,为int型自增长子段 alter table #t add [myid] int NOT NULL IDENTITY(1,1) --添加一列,默认填充全球唯一标识 alter table #t add [myid1] uniqueidentifier NOT NULL default (newid()) select * from #t drop table #t
--给查询结果集增加自增长列 --无主键时: select IDENTITY( int,1,1) as ID,[ Password ] into #t from ST_User select * from #t
--有主键时: select ( select SUM (1) from ST_User where ID<= a.ID) as myID,* from ST_User a order by myID --定义表变量 declare @t table ( id int not null, msg nvarchar(50) null ) insert into @t values (1,‘1‘ ) insert into @t values (2,‘2‘ ) select * from @t
三、循环 --while循环 declare @a int declare @ sum int set @a=1 set @ sum =0 while @a<=100 begin set @ sum [email?protected] set @a+=1 end print @ sum
四、条件语句 --if,else条件分支 if(1+1=2) begin print ‘对‘ end else begin print ‘错‘ end
--when then条件分支 declare @today int declare @week nvarchar(3) set @today=3 set @week= case when @today=1 then ‘星期一‘ when @today=2 then ‘星期二‘ when @today=3 then ‘星期三‘ when @today=4 then ‘星期四‘ when @today=5 then ‘星期五‘ when @today=6 then ‘星期六‘ when @today=7 then ‘星期日‘ else ‘值错误‘ end print @week
五、游标 declare @ID int declare @Oid int declare @Login varchar (50)
--定义一个游标 declare user_cur cursor for select ID,[Login] from ST_User --打开游标 open user_cur while @@fetch_status=0 begin --读取游标 fetch next from user_cur into @ID,@Oid,@Login print @ID --print @Login end close user_cur --摧毁游标 deallocate user_cur
六、触发器 --创建触发器 Create trigger User_OnUpdate? On ST_User? for Update As declare @msg nvarchar(50) [email?protected]记录修改情况 select @msg = N ‘姓名从“‘ + Deleted. Name + N ‘”修改为“‘ + Inserted. Name + ‘”‘ from Inserted,Deleted --插入日志表 insert into [LOG](MSG) values (@msg)
--删除触发器 drop trigger User_OnUpdate
七、存储过程 --创建带output参数的存储过程 CREATE PROCEDURE PR_Sum @a int, @b int, @ sum int output AS BEGIN set @ sum [email?protected][email?protected] END
--创建Return返回值存储过程 CREATE PROCEDURE PR_Sum2 @a int, @b int AS BEGIN Return @[email?protected] END
--执行存储过程获取output型返回值 declare @mysum int execute PR_Sum 1,@mysum output print @mysum
--执行存储过程获取Return型返回值 declare @mysum2 int execute @mysum2= PR_Sum2 1,2 print @mysum2
八、自定义函数 --新建标量值函数 create function FUNC_Sum1 ( @a int, @b int ) returns int as begin return @[email?protected]end--新建内联表值函数create function FUNC_UserTab_1(@myId int)returns tableasreturn ( select * from ST_User where ID<@myId)--新建多语句表值函数create function FUNC_UserTab_2(@myId int)returns @t table([ID] [ int ] NOT NULL,[Oid] [ int ] NOT NULL,[Login] [nvarchar](50) NOT NULL,[Rtx] [nvarchar](4) NOT NULL,[ Name ] [nvarchar](5) NOT NULL,[ Password ] [nvarchar]( max ) NULL,[State] [nvarchar](8) NOT NULL)asbegininsert into @t select * from ST_User where ID<@myIdreturnend--调用表值函数select * from dbo.FUNC_UserTab_1(15)--调用标量值函数declare @s intset @s=dbo.FUNC_Sum1(100,50)print @s--删除标量值函数drop function FUNC_Sum1
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