SQLSERVER存储过程实例（下）-优快云博客

实例 3: 使用带有复杂 SELECT 语句的简单过程

下面的存储过程从四个表的联接中返回所有作者姓名 / 出版的书籍/出版社。该存储过程不使用任何参数。

USE pubs
IF EXISTS (SELECT name FROM sysobjects<span style="font-family:Times New Roman;"> </span>WHERE name = 'au_info_all' AND type = 'P' )
DROP PROCEDURE au_info_all
GO

CREATE PROCEDURE au_info_all
AS
SELECT au_lname , au_fname , title , pub_name
FROM authors a INNER JOIN titleauthor ta
      ON a .au_id = ta .au_id INNER JOIN titles t
      ON t .title_id = ta .title_id INNER JOIN publishers p
      ON t .pub_id = p .pub_id
GO

<span style="font-family:Times New Roman;">--</span>au_info_all 存储过程可以通过以下方法执行 ：
EXECUTE au_info_all

-- Or
EXEC au_info_all

实例 4：使用带有参数的简单过程

CREATE PROCEDURE au_info
   @lastname varchar(40 ),
   @firstname varchar(20 )
AS
SELECT au_lname , au_fname , title , pub_name
FROM authors a INNER JOIN titleauthor ta
      ON a .au_id = ta .au_id INNER JOIN titles t
      ON t .title_id = ta .title_id INNER JOIN publishers p
      ON t .pub_id = p .pub_id
WHERE  au_fname = @firstname
AND au_lname = @lastname
GO

<span style="font-family:Times New Roman;">--</span>au_info 存储过程可以通过以下方法执行 ：
EXECUTE au_info 'Dull', 'Ann'

-- Or
EXECUTE au_info @lastname = 'Dull' , @firstname = 'Ann'

-- Or
EXECUTE au_info @firstname = 'Ann' , @lastname = 'Dull'

-- Or
EXEC au_info 'Dull', 'Ann'

-- Or
EXEC au_info @lastname = 'Dull' , @firstname = 'Ann'

-- Or
EXEC au_info @firstname = 'Ann' , @lastname = 'Dull'


<span style="font-family:Times New Roman;">--</span>如果该过程是批处理中的第一条语句 ，则可使用：
au_info 'Dull' , 'Ann'

-- Or
au_info @lastname = 'Dull', @firstname = 'Ann'

-- Or
au_info @firstname = 'Ann', @lastname = 'Dull'

实例5：使用带有通配符参数的简单过程

CREATE PROCEDURE au_info2
@lastname varchar (30) = 'D%',
@firstname varchar (18) = '%'
AS
SELECT au_lname , au_fname , title , pub_name
FROM authors a INNER JOIN titleauthor ta
   ON a.au_id = ta.au_id INNER JOIN titles t
   ON t.title_id = ta.title_id INNER JOIN publishers p
   ON t.pub_id = p.pub_id
WHERE au_fname LIKE @firstname
AND au_lname LIKE @lastname
GO

<span style="font-family:Times New Roman;">--</span>au_info2 存储过程可以用多种组合执行 。下面只列出了部分组合：
 EXECUTE au_info2
-- Or
EXECUTE au_info2 'Wh%'
-- Or
EXECUTE au_info2 @firstname = 'A%'
-- Or
EXECUTE au_info2 '[CK]ars[OE]n'
-- Or
EXECUTE au_info2 'Hunter', 'Sheryl'
-- Or
EXECUTE au_info2 'H%', 'S%'= 'proc2'

实例 6：if... else
存储过程，其中@case 作为执行update的选择依据，用if ...else实现执行时根据传入的参数执行不同的修改

--下面是if ……else的存储过程：
if exists (select 1 from sysobjects where name = 'Student' and type = 'u' )
drop table Student
go

if exists (select 1 from sysobjects where name = 'spUpdateStudent' and type = 'p' )
drop proc spUpdateStudent
go

create table Student
(
fName nvarchar (10),
fAge<span style="font-family:Courier New;">,</span>
smallint ,
fDiqu varchar (50),
fTel  int
)
go

insert into Student values ('X.X.Y' , 28 , 'Tesing' , 888888 )
go

create proc spUpdateStudent
(
@fCase int ,
@fName nvarchar (10),
@fAge smallint ,
@fDiqu varchar (50),
@fTel  int
)
as
update Student
set fAge = @fAge, -- 传1,2,3 都要更新fAge 不需要用 case
fDiqu = (case when @fCase = 2 or @fCase = 3 then @fDiqu else fDiqu end ),
fTel  = (case when @fCase = 3 then @fTel else fTel end )
where fName = @fName
select * from Student
go

-- 只改Age
exec spUpdateStudent
@fCase = 1,
@fName = N'X.X.Y' ,
@fAge = 80,
@fDiqu = N'Update' ,
@fTel  = 1010101

-- 改Age 和Diqu
exec spUpdateStudent
@fCase = 2,
@fName = N'X.X.Y' ,
@fAge = 80,
@fDiqu = N'Update' ,
@fTel  = 1010101

-- 全改
exec spUpdateStudent
@fCase = 3,
@fName = N'X.X.Y' ,
@fAge = 80,
@fDiqu = N'Update' ,
@fTel  = 1010101