sqlͳ¼Æ¿Õ¼Ç¼ÎÊÌâ
±íÃû£ºMyTable
Dept Name
1 a
1 b
2 c
2 d
2 e
3 NULL
ÎÒÏëÒªµÄ½á¹û£º
²¿ÃÅÃû ÈËÔ±Ãûµ¥
1 a,b
2 c,d,e
3 NULL
СµÜ¸ù¾ÝÍøÉϽéÉܵķ½·¨£¬ÓÃcursorʵÏÖÁ˵ÚÒ»µÚ¶þÐÐÊý¾Ý£¬¶ÔµÚÈýÐÐÎÞÄÜΪÁ¦£¬Çë´óϺָ½Ì~
ûÃ÷°×Â¥Ö÷µÚÈýÐÐÏëÔõôÑùÄØ??
µÚÈýÐÐûÈË£¬¿Õ¼Ç¼
SQL code:
----------------------------------------------------------------
-- Author :fredrickhu(ÎÒÊÇСF£¬Ïò¸ßÊÖѧϰ)
-- Date :2009-11-25 15:25:09
-- Version:
-- Microsoft SQL Server 2005 - 9.00.4035.00 (Intel X86)
-- Nov 24 2008 13:01:59
-- Copyright (c) 1988-2005 Microsoft Corporation
-- Developer Edition on Windows NT 5.2 (Build 3790: Service Pack 1)
--
----------------------------------------------------------------
--> ²âÊÔÊý¾Ý£º[tb]
if object_id('[tb]') is not null drop table [tb]
go
create table [tb]([Dept] int,[Name] varchar(1))
insert [tb]
select 1,'a' union all
select 1,'b' union all
select 2,'c' union all
select 2,'d' union al
Ïà¹ØÎÊ´ð£º
Ö´ÐеÄ˳Ðò£º
1£©Îļþä¯ÀÀ¿ò£¨Ñ¡ÔñÎļþʹÓã©
Ñ¡ÔñºÃÎļþºó
µã»÷Ò»¸öµ¼Èë°´Å¥µÄʱºò £¬°ÑÉÏÃæÉÏ´«¿òÀïµÄcsvÎļþÒÔÒ»¸öIDΪÎļþÃû£¬ÉÏ´«µ½**/**Îļþ¼ÐÏÂ
2£©¶ÁÈ¡Õâ¸öÎļþ¼ÐϵÄcsvµÄÎļþ£¬×ª»»³Ésql
3 ......
select convert(varchar(50),cast(convert(numeric(18,2),1275674000000/100000000)as real))+'ÒÚ'
select cast(convert(numeric(18,2),1275674000000/100000000)as real)
ΪʲôÉÏÒ»¸öÓÃvarcharת»»ºó¾ÍÖ»±£ÁôÁËÒ ......
pl/SqlÈçºÎ²éѯ×Ö·û´®°üÀ¨%,
ÀýÈç:TABLE a
columnA
'222'
'33%44'
ÈçºÎ²éѯ±íaÖÐcolumnA×Ö¶ÎÖÐÄÄЩÐаüº¬'%'
лл
select * from a
where columna like '%/%%' escape '/'
UP
SELECT * from a ......
ÌâÄ¿£º°Ñ¡°SC¡±±íÖС°Ò¶Æ½¡±ÀÏʦ½ÌµÄ¿ÎµÄ³É¼¨¶¼¸ü¸ÄΪ´Ë¿Î³ÌµÄƽ¾ù³É¼¨£»
sqlÓï¾ä£º
update SC set score=(SELECT avg(SC_2.score)
from SC SC_2
WHERE S ......