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 程式師世界 >> 數據庫知識 >> 其他數據庫知識 >> MSSQL2008 >> SQL Server 2008 存儲進程示例

SQL Server 2008 存儲進程示例

編輯:MSSQL2008

SQL Server 2008 存儲進程示例。本站提示廣大學習愛好者:(SQL Server 2008 存儲進程示例)文章只能為提供參考,不一定能成為您想要的結果。以下是SQL Server 2008 存儲進程示例正文


 
--有輸出參數的存儲進程--
create proc GetComment
(@commentid int)
as
select * from Comment where CommentID=@commentid
 
--有輸出與輸入參數的存儲進程--
create proc GetCommentCount
@newsid int,
@count int output
as
select @count=count(*) from Comment where NewsID=@newsid
 
 
--前往單個值的函數--
create function MyFunction
(@newsid int)
returns int
as
begin
declare @count int
select @count=count(*) from Comment where NewsID=@newsid
return @count
end
 
--挪用辦法--
declare @count int
exec @count=MyFunction 2
print @count
 
--前往值為表的函數--
Create function GetFunctionTable
(@newsid int)
returns table
as
return
(select * from Comment where NewsID=@newsid)
 
--前往值為表的函數的挪用--
select * from GetFunctionTable(2)

SQLServer 存儲進程中不拼接SQL字符串完成多前提查詢

--之前拼接的寫法
  set @sql=' select * from table where 1=1 '
  if (@addDate is not null)
   set @sql = @sql+' and addDate = '+ @addDate + ' '
  if (@name <>'' and is not null)
   set @sql = @sql+ ' and name = ' + @name + ' '
  exec(@sql)

上面是 不采取拼接SQL字符串完成多前提查詢的處理計劃

  --第一種寫法是 感到代碼有些冗余
  if (@addDate is not null) and (@name <> '')
   select * from table where addDate = @addDate and name = @name
  else if (@addDate is not null) and (@name ='')
   select * from table where addDate = @addDate
  else if(@addDate is null) and (@name <> '')
   select * from table where and name = @name
  else if(@addDate is null) and (@name = '')
  select * from table
  --第二種寫法是
  select * from table where (addDate = @addDate or @addDate is null) and (name = @name or @name = '')
  --第三種寫法是
  SELECT * FROM table where
  addDate = CASE @addDate IS NULL THEN addDate ELSE @addDate END,
  name = CASE @name WHEN '' THEN name ELSE @name END

SQLSERVER存儲進程根本語法

1、界說變量

--簡略賦值
declare @a int
set @a=5
print @a
 
--應用select語句賦值
declare @user1 nvarchar(50)
select @user1= '張三'
print @user1
declare @user2 nvarchar(50)
select @user2 = Name from ST_User where ID=1
print @user2
 
--應用update語句賦值
declare @user3 nvarchar(50)
update ST_User set @user3 = Name where ID=1
print @user3
 

2、表、暫時表、表變量

--創立暫時表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
);
--向暫時表1拔出一筆記錄
insert into #DU_User1 (ID,Oid,[Login],Rtx, Name ,[ Password ],State) values (100,2, 'LS' , '0000' , '暫時' , '321' , '特別' );
 
--從ST_User查詢數據,填充至重生成的暫時表
select * into #DU_User2 from ST_User where ID<8
 
--查詢並結合兩暫時表
select * from #DU_User2 where ID<3 union select * from #DU_User1
 
--刪除兩暫時表
drop table #DU_User1
drop table #DU_User2
 
--創立暫時表
CREATE TABLE #t
(
   [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 ,
)
 
--將查詢成果集(多條數據)拔出暫時表
insert into #t select * from ST_User
--不克不及如許拔出
--select * into #t from dbo.ST_User
 
--添加一列,為int型自增加子段
alter table #t add [myid] int NOT NULL IDENTITY(1,1)
--添加一列,默許填充全球獨一標識
alter table #t add [myid1] uniqueidentifier NOT NULL default (newid())
 
select * from #t
drop table #t
--給查詢成果集增長自增加列
 
--無主鍵時:
select IDENTITY( int ,1,1) as ID, Name ,[Login],[ Password ] into #t from ST_User
select * from #t
 
--有主鍵時:
select ( select SUM (1) from ST_User where ID<= a.ID) as myID,* from ST_User a order by myID
--界說表變量
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

3、輪回

--while輪回盤算1到100的和
declare @a int
declare @ sum int
set @a=1
set @ sum =0
while @a<=100
begin
   set @ sum +=@a
   set @a+=1
end
print @ sum

4、前提語句

--if,else前提分支
if(1+1=2)
begin
   print '對'
end
else
begin
   print '錯'
end
 
--when then前提分支
declare @today int
declare @week nvarchar(3)
set @today=3
set @week= case
   when @today=1 then '禮拜一'
   when @today=2 then '禮拜二'
   when @today=3 then '禮拜三'
   when @today=4 then '禮拜四'
   when @today=5 then '禮拜五'
   when @today=6 then '禮拜六'
   when @today=7 then '禮拜日'
   else '值毛病'
end
print @week
 

5、游標

declare @ID int
declare @Oid int
declare @Login varchar (50)
 
--界說一個游標
declare user_cur cursor for select ID,Oid,[Login] from ST_User
--翻開游標
open user_cur
while @@fetch_status=0
begin
--讀取游標
   fetch next from user_cur into @ID,@Oid,@Login
   print @ID
   --print @Login
end
close user_cur
--摧毀游標
deallocate user_cur

5、游標

declare @ID int
declare @Oid int
declare @Login varchar (50)
 
--界說一個游標
declare user_cur cursor for select ID,Oid,[Login] from ST_User
--翻開游標
open user_cur
while @@fetch_status=0
begin
--讀取游標
   fetch next from user_cur into @ID,@Oid,@Login
   print @ID
   --print @Login
end
close user_cur
--摧毀游標
deallocate user_cur

6、觸發器

  觸發器中的暫時表:
  Inserted
  寄存停止insert和update 操作後的數據
  Deleted
  寄存停止delete 和update操作前的數據

--創立觸發器
Create trigger User_OnUpdate 
   On ST_User 
   for Update 
As 
   declare @msg nvarchar(50)
   --@msg記載修正情形
   select @msg = N '姓名從“' + Deleted. Name + N '”修正為“' + Inserted. Name + '”' from Inserted,Deleted
   --拔出日記表
   insert into [LOG](MSG) values (@msg)
   
--刪除觸發器
drop trigger User_OnUpdate

7、存儲進程

--創立帶output參數的存儲進程
CREATE PROCEDURE PR_Sum
   @a int ,
   @b int ,
   @ sum int output
AS
BEGIN
   set @ sum =@a+@b
END
 
--創立Return前往值存儲進程
CREATE PROCEDURE PR_Sum2
   @a int ,
   @b int
AS
BEGIN
   Return @a+@b
END
   
--履行存儲進程獲得output型前往值
declare @mysum int
execute PR_Sum 1,2,@mysum output
print @mysum
 
--履行存儲進程獲得Return型前往值
declare @mysum2 int
execute @mysum2= PR_Sum2 1,2
print @mysum2

8、自界說函數

  函數的分類:
    1)標量值函數
    2)表值函數
        a:內聯表值函數
        b:多語句表值函數
    3)體系函數

--新建標量值函數
create function FUNC_Sum1
(
   @a int ,
   @b int
)
returns int
as
begin
   return @a+@b
end
 
--新建內聯表值函數
create function FUNC_UserTab_1
(
   @myId int
)
returns table
as
return ( select * from ST_User where ID<@myId)
 
--新建多語句表值函數
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
)
as
begin
   insert into @t select * from ST_User where ID<@myId
   return
end
 
--挪用表值函數
select * from dbo.FUNC_UserTab_1(15)
--挪用標量值函數
declare @s int
set @s=dbo.FUNC_Sum1(100,50)
print @s
 
--刪除標量值函數
drop function FUNC_Sum1
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