存儲過程幾種寫法
1)創建使用參數的存儲過程
Create Proc au_info @lastname varchar(40),@firstname varchar(20)
As
Select au_lname,au_fname,title,pub_name
From ...
where au_fname=@firstname And au_lname=@lastname
Go
EXECUTE au_info ringer,anne
2)創建使用參數默認值的存儲過程,該存儲過程在沒有輸入參數的情況下將默認值得到的結果輸出
Create Proc au_info @lastname varchar(40)='ringer',@firstname varchar(20)='anne'
As
Select au_lname,au_fname,title,pub_name
From ...
where au_fname=@firstname And au_lname=@lastname
Go
EXECUTE au_info
3)用顯式值替代參數默認值的存儲過程
Create Proc showind @table varchar(30) ='titles'
as
SELECT Table_Name=sysobjects.name,
INDEX_Name=sysindexes.name,index_id=indid
from sysindexes inner join sysobjects on sysobjects.id=sysindexes.id
where sysobjects.name=@table
EXECUTE showind authors
4)使用參數默認值NULL來創建存儲過程,在這種情況下如果沒有提供參數值,SQL將不會出錯顯示
Create Proc showind @table varchar(30) =Null
as
IF @table is NUll
print '請輸入參數'
else
SELECT Table_Name=sysobjects.name,
INDEX_Name=sysindexes.name,index_id=indid
from sysindexs inner join sysobjects on sysobjects.id=sysindexes.id
where sysobjects.name=@table
EXECUTE showind authors
5)使用包含通配符的參數默認值創建存儲過程
通配符包括(% , _ , [ ]和 [^]),注意需要用Like關鍵字
CREATE PROC au_info @lastname varchar(40)='r%' , @firstname varchar(20)='%' AS
Select au_lname,au_fname,title,pub_name
from authors inner join titleauthor on authors.au_id=titleauthor.au_id
join titles on titleauthor.title_id=titles.title_id
join publishers on titles.pub_id=publishers.pub_id
where au_fname like @firstname
and au_lname like @lastname
GO
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示例A. 創建使用參數的存儲過程下例創建一個在 pubs 數據庫中很有用的存儲過程。現在執行 au_info 存儲過程：EXECUTE au_info Ringer, AnneGO下面是結果集： au_lname au_fname title pub_name --------- --------- --------------------- ---------------- Ringer Anne The Gourmet Microwave Binnet &Hardley Ringer Anne Is Anger the Enemy? New Moon Books (2 row(s) affected)B. 創建使用參數默認值的存儲過程下例創建一個存儲過程 pub_info2，該存儲過程顯示作爲參數給出的出版商所出版的某本書的作者姓名。