BlogJava-Nothing is impossible for a willing heart-随笔分类-Oraclehttp://www.blogjava.net/freedream/category/15855.htmlI belive I canzh-cnTue, 27 Feb 2007 18:45:44 GMTTue, 27 Feb 2007 18:45:44 GMT60一些SQL语句http://www.blogjava.net/freedream/archive/2006/09/29/72904.htmlJAVA_UFOJAVA_UFOFri, 29 Sep 2006 14:02:00 GMThttp://www.blogjava.net/freedream/archive/2006/09/29/72904.htmlhttp://www.blogjava.net/freedream/comments/72904.htmlhttp://www.blogjava.net/freedream/archive/2006/09/29/72904.html#Feedback0http://www.blogjava.net/freedream/comments/commentRss/72904.htmlhttp://www.blogjava.net/freedream/services/trackbacks/72904.htmlcreate proc #pr_xxx
as
select 'fff'

exec #pr_xxx    --执行存储过程



-------扩展存储过程
exec xp_cmdshell 'dir c:\'
可执行DOS的命令，如删除，创建，复制等等



------存储过程实例一(加法运算)
create procedure pr_sss
@n1 smallint,
@n2 smallint,
@sum smallint output
as
set @sum=@n1+@n2
return 10
go

declare @sss smallint,@ddd int
exec @ddd=pr_sss 20,10,@sss output
print @ddd
print @sss



------存储过程实例二(pr_helptext)
create procedure pr_helptext    --修改用alter
@arg1 varchar(100)
as
select text from syscomments where object_id(@arg1)=id
go

exec pr_helptext pr_sss



------存储过程实例三
create procedure pr_ksk
as
insert into ssss_bak
select * from ssss

exec pr_ksk


------自动备份数据库(with init是重写)
declare @path varchar(100)
set @path=convert(varchar(10),getdate(),120)
set @path='d:\bak1\'+@path+'.bak'
backup database shidian to disk=@path with init



------自动删除备份(前5天)
declare @path varchar(100)
set @path=convert(varchar(10),getdate()-5,120)
set @path=' del d:\bak1\'+@path+'.bak'
exec master.dbo.xp_cmdshell @path



-------自动备份删除文件(前5天)
declare @path varchar(100)
set @path=convert(varchar(10),getdate(),120)
set @path='d:\bak1\'+@path+'.bak'
print @path
backup database shidian to disk=@path with INIT
set @path=convert(varchar(10),getdate()-5,120)
set @path='del d:\bak1\'+@path+'.bak'
print @path
EXEC master.dbo.xp_cmdshell  @path

使用加法运算符将天数加到日期和时间值中  
下面的示例将若干天数加到   datetime   日期上。

SELECT DATEDIFF(mi, CONVERT(datetime,'11:00:00'),CONVERT(datetime,'13:30:00'))/60.0

SELECT DATEDIFF(MINUTE,'2002-1-1 11:00:00','2002-1-1 13:30:00') / 60 + CASE WHEN DATEDIFF(minute,'2002-1-1 11:00:00','2002-1-1 13:30:00') % 60 >=30 THEN 0.5 ELSE 0 END 
   
  DECLARE   @startdate   datetime,   @adddays   int  
  SET   @startdate   =   '1/10/1900   12:00   AM'  
  SET   @adddays   =   5  
  SET   NOCOUNT   OFF  
  SELECT   @startdate   +   1.25   AS   'Start   Date',    
        @startdate   +   @adddays   AS   'Add   Date'  
   
  下面是结果集：  
   
  Start   Date                                     Add   Date                                          
  ---------------------------   ---------------------------    
  Jan   11   1900     6:00AM                   Jan   15   1900   12:00AM                  




JAVA_UFO 2006-09-29 22:02 发表评论
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