Sql存储过程

下面的存储过程从四个表的联接中返回所有作者（提供了姓名）、出版的书籍以及出版社。该存储过程不使用任何参数。

USE pubs
IF EXISTS (SELECT name FROM sysobjects
          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 

EXECUTE au_info_all

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
   au_info

存储过程可以通过以下方法执行：

EXECUTE au_info 'Dull', 'Ann'