存储过程

存储过程
6.1.    创建无参数存储过程

IF EXISTS (SELECT name FROM sysobjects
WHERE name = 'au_info_all' AND type = 'P')
DROP PROCEDURE au_info_all –判断如果存在XXX过程就删除

CREATE PROCEDURE au_info_all –创建存储过程
AS
SELECT pub_name FROM authors

IF EXISTS (SELECT name FROM sysobjects
WHERE name = 'au_info_all' AND type = 'P')
DROP PROCEDURE au_info_all –判断如果存在XXX过程就删除
CREATE PROCEDURE au_info_all –创建存储过程
AS
SELECT pub_name FROM authors

 

SQLSERVER 调用方法：

EXECUTE au_info_all/ EXEC au_info_all

EXECUTE au_info_all/ EXEC au_info_all

 

ORACLE 调用方法：
6.2.    创建有参数存储过程

IF EXISTS (SELECT name FROM sysobjects
WHERE name = 'au_info' AND type = 'P')
DROP PROCEDURE au_info

CREATE PROCEDURE au_info
   @lastname varchar(40),
   @firstname varchar(20)
AS
SELECT au_lname, au_fname, title, pub_name
   FROM authors
   WHERE  au_fname = @firstname
      AND au_lname = @lastname

IF EXISTS (SELECT name FROM sysobjects
WHERE name = 'au_info' AND type = 'P')
DROP PROCEDURE au_info
CREATE PROCEDURE au_info
   @lastname varchar(40),
   @firstname varchar(20)
AS
SELECT au_lname, au_fname, title, pub_name
   FROM authors
   WHERE  au_fname = @firstname
      AND au_lname = @lastname

 

SQLSERVER 调用方法：

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

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

 

6.3.    创建有通配符参数存储过程
从四个表的联接中只返回指定的作者（提供了姓名）、出版的书籍以及出版社。该存储过程对传递的参数进行模式匹配，如果没有提供参数，则使用预设的默认值.

IF EXISTS (SELECT name FROM sysobjects
      WHERE name = 'au_info2' AND type = 'P')
   DROP PROCEDURE au_info2

CREATE PROCEDURE au_info2
   @lastname varchar(30) = 'D%',
   @firstname varchar(18) = '%'
AS
SELECT au_lname, au_fname, title, pub_name
FROM authors
WHERE au_fname LIKE @firstname
   AND au_lname LIKE @lastname

IF EXISTS (SELECT name FROM sysobjects
      WHERE name = 'au_info2' AND type = 'P')
   DROP PROCEDURE au_info2
CREATE PROCEDURE au_info2
   @lastname varchar(30) = 'D%',
   @firstname varchar(18) = '%'
AS
SELECT au_lname, au_fname, title, pub_name
FROM authors
WHERE au_fname LIKE @firstname
   AND au_lname LIKE @lastname

 

SQLSERVER 调用方法：

EXECUTE au_info2
EXECUTE au_info2 'Wh%'
EXECUTE au_info2 @firstname = 'A%'
EXECUTE au_info2 'Hunter', 'Sheryl'
EXECUTE au_info2 'H%', 'S%'

EXECUTE au_info2
EXECUTE au_info2 'Wh%'
EXECUTE au_info2 @firstname = 'A%'
EXECUTE au_info2 'Hunter', 'Sheryl'
EXECUTE au_info2 'H%', 'S%'

 

6.4.    创建有Output参数存储过程

IF EXISTS(SELECT name FROM sysobjects
      WHERE name = 'titles_sum' AND type = 'P')
   DROP PROCEDURE titles_sum

CREATE PROCEDURE
titles_sum
@@TITLE varchar(40) = '%',
@@SUM money OUTPUT
AS
SELECT 'Title Name' = title
FROM titles
WHERE title LIKE @@TITLE
SELECT @@SUM = SUM(price)
FROM titles WHERE title LIKE @@TITLE

IF EXISTS(SELECT name FROM sysobjects
      WHERE name = 'titles_sum' AND type = 'P')
   DROP PROCEDURE titles_sum
CREATE PROCEDURE
titles_sum
@@TITLE varchar(40) = '%',
@@SUM money OUTPUT
AS
SELECT 'Title Name' = title
FROM titles
WHERE title LIKE @@TITLE
SELECT @@SUM = SUM(price)
FROM titles WHERE title LIKE @@TITLE

 

SQLSERVER 调用方法：

DECLARE @@TOTALCOST money
EXECUTE titles_sum 'The%', @@TOTALCOST OUTPUT
IF @@TOTALCOST < 200
BEGIN
   PRINT 'All of these titles can be purchased for less than $200.'
END
ELSE
SELECT 'The total cost of these titles is $' + RTRIM(CAST(@@TOTALCOST AS varchar(20)))

DECLARE @@TOTALCOST money
EXECUTE titles_sum 'The%', @@TOTALCOST OUTPUT
IF @@TOTALCOST < 200
BEGIN
   PRINT 'All of these titles can be purchased for less than $200.'
END
ELSE
SELECT 'The total cost of these titles is $' + RTRIM(CAST(@@TOTALCOST AS varchar(20)))

 

6.5.    创建有Output游标参数存储过程

IF EXISTS (SELECT name FROM sysobjects
WHERE name = 'titles_cursor' and type = 'P')
DROP PROCEDURE titles_cursor
CREATE PROCEDURE titles_cursor @titles_cursor CURSOR VARYING OUTPUT
AS
SET @titles_cursor = CURSOR
FORWARD_ONLY STATIC FOR
SELECT *
FROM titles
OPEN @titles_cursor

IF EXISTS (SELECT name FROM sysobjects
WHERE name = 'titles_cursor' and type = 'P')
DROP PROCEDURE titles_cursor
CREATE PROCEDURE titles_cursor @titles_cursor CURSOR VARYING OUTPUT
AS
SET @titles_cursor = CURSOR
FORWARD_ONLY STATIC FOR
SELECT *
FROM titles
OPEN @titles_cursor

 

SQLSERVER 调用方法：

DECLARE @MyCursor CURSOR
EXEC titles_cursor @titles_cursor = @MyCursor OUTPUT
WHILE (@@FETCH_STATUS = 0)
BEGIN
   FETCH NEXT FROM @MyCursor
END
CLOSE @MyCursor
DEALLOCATE @MyCursor

DECLARE @MyCursor CURSOR
EXEC titles_cursor @titles_cursor = @MyCursor OUTPUT
WHILE (@@FETCH_STATUS = 0)
BEGIN
   FETCH NEXT FROM @MyCursor
END
CLOSE @MyCursor
DEALLOCATE @MyCursor

 

6.6.    创建有WITH RECOMPILE存储过程
当每次调用存储过程时都重新编译存储过程，目前尚未发现这个参数的用处

CREATE PROCEDURE titles_by_author
@@LNAME_PATTERN varchar(30) = '%'
WITH RECOMPILE
AS
SELECT RTRIM(au_fname) + ' ' + RTRIM(au_lname) AS 'Authors full name',
   title AS Title
FROM authors a INNER JOIN titleauthor ta
   ON a.au_id = ta.au_id INNER JOIN titles t
   ON ta.title_id = t.title_id
WHERE au_lname LIKE @@LNAME_PATTERN

CREATE PROCEDURE titles_by_author
@@LNAME_PATTERN varchar(30) = '%'
WITH RECOMPILE
AS
SELECT RTRIM(au_fname) + ' ' + RTRIM(au_lname) AS 'Authors full name',
   title AS Title
FROM authors a INNER JOIN titleauthor ta
   ON a.au_id = ta.au_id INNER JOIN titles t
   ON ta.title_id = t.title_id
WHERE au_lname LIKE @@LNAME_PATTERN

 

6.7.    创建有WITH ENCRYPTION存储过程
对存储过程进行加密，用于隐藏存储过程的文本,有编程私心的很重要噢!

CREATE PROCEDURE encrypt_this
WITH ENCRYPTION
AS SELECT * FROM authors

CREATE PROCEDURE encrypt_this
WITH ENCRYPTION
AS SELECT * FROM authors

 

6.8.    调用用户定义的系统存储过程

6.9.    删除存储过程

DROP PROCEDURE procecureName

DROP PROCEDURE procecureName

 

6.10.    在SQL中存储过程的调用
?    无参数存储过程调用

EXECUTE au_info_all

EXECUTE au_info_all

 

?    有参数存储过程调用

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

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

 

?    通配符存储过程调用

EXECUTE au_info2
EXECUTE au_info2 'Wh%'
EXECUTE au_info2 @firstname = 'A%'
EXECUTE au_info2 'Hunter', 'Sheryl'
EXECUTE au_info2 'H%', 'S%'

EXECUTE au_info2
EXECUTE au_info2 'Wh%'
EXECUTE au_info2 @firstname = 'A%'
EXECUTE au_info2 'Hunter', 'Sheryl'
EXECUTE au_info2 'H%', 'S%'

 

?    Output参数存储过程调用

DECLARE @@TOTALCOST money
EXECUTE titles_sum 'The%', @@TOTALCOST OUTPUT
IF @@TOTALCOST < 200
BEGIN
       PRINT ' '
END
ELSE
SELECT 'The total cost of these titles is $' + RTRIM(CAST(@@TOTALCOST AS varchar(20)))

DECLARE @@TOTALCOST money
EXECUTE titles_sum 'The%', @@TOTALCOST OUTPUT
IF @@TOTALCOST < 200
BEGIN
       PRINT ' '
END
ELSE
SELECT 'The total cost of these titles is $' + RTRIM(CAST(@@TOTALCOST AS varchar(20)))

 

?    Output游标参数存储过程调用

DECLARE @MyCursor CURSOR
EXEC titles_cursor @titles_cursor = @MyCursor OUTPUT
WHILE (@@FETCH_STATUS = 0)
BEGIN
   FETCH NEXT FROM @MyCursor
END
CLOSE @MyCursor
DEALLOCATE @MyCursor