Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

mssql Çó¶à×Ö¶Î×î´óÖµ

//Ïà¹Øsql
SQL code:

create table tb1
(
tId int,
tName nvarchar(20),
class1 int,
class2 int
)
insert into tb1
select 1,'test',10,20
union all
select 1,'test1',20,35
union all
select 1,'test2',30,30
union all
select 2,'test21',30,85
union all
select 2,'test22',50,75
union all
select 3,'test31',60,65
union all
select 3,'test32',70,70



//µ¥¸ö×ֶεĻᣬÏÂÃæÊÇÇ󵥸ö×ֶεÄ
SQL code:

select a.* from tb1 a,(select tId,max(class1) as maxT from tb1 group by tId) b
where a.tId=b.tId and a.class1=b.maxT order by a.tId



//Êý¾ÝÏÔʾÈçÏÂ
SQL code:

tId tName class1 class2
1 test2 30 30
2 test22 50 75
3 test32 70 70



//ÎÒÏëÏÔʾΪ
SQL code:

tId tName maxClass
1 test2 35
2 test22 85
3 test32 70



ÎÒÏëÒªµÄ½á¹û¾ÍÊÇclass1,class2²»Çø·Ö£¬È¡×î´óÖµ¡£

//лл¡£
SELECT TID,TNAME,MAX(CLASS1 )
from (
SELECT TID,TNAME,CLASS1 from TB
UNION


Ïà¹ØÎÊ´ð£º

MSSqlÊý¾Ý¿â±»¹ÒÂí

ÏÖÓÐÒ»¸öASP+mssqlµÄÍøÕ¾£¬±»¹ÒÂíÁË£¬½«ÀïÃæÒ»¸ö±íÖеÄntext×ֶιÒÂí¹ÒÂí£¬¡°<script src=http://ľÂíµØÖ·></script>¡±,µÄ·½Ê½ÊÇ£¬²»¶ÏµØÐ޸ĸÃ×ֶεÄÖµ£¬Ö±½Ó¼ÓÔÚ×îºóµÄ£¬Ê±¼ä³¤ÁË£¬¿ÉÒÔ¿´µ½¸Ã×Ö¶ÎÖÐÓÐ ......

mssql ¹ØÓÚwhereÓï¾äµÄλÖÃ

ÀýÈ磺select a.* from (select id,code from b left join c on b.id=c.id)a where id=1
ÕâÀïµÄwhere ÔÚÖ´ÐеÄʱºò£¬ where »áÓÅ»¯ÊÇ·ñ½øÈ뵽СÀ¨ºÅÀïÃæÖ´ÐÐ?????
SQL code:
select id,code from b left join ......

mssql£¬mysqlÓëmstlq

·´ÕýÎÒÊǾ­³£·Ö²»Çå¡­¡­
¼ÌÐøÉ¢·Ö
µÚÒ»¸ö±ÕÔ´£¬µÚ¶þ¸ö¿ªÔ´£¬µÚÈý¸öûŮÈËÔµ¡­¡­

LZÄ㻹ÓпÉÓ÷Öô£¿

ÒýÓÃ
LZÄ㻹ÓпÉÓ÷Öô£¿
5·Ö

ÒýÓÃ
µÚÒ»¸ö±ÕÔ´£¬µÚ¶þ¸ö¿ªÔ´£¬µÚÈý¸öûŮÈËÔµ¡­¡­

ÓÐÒâ˼¡£¿´±êÌ ......

¼±ÇóÒ»MSSQLÈ¥³ýÖØ¸´ÏîÓï¾ä


»ù´¡±íA¡¢BÈçͼ£¬ÓÉÓÚÒ»ÌõÐÂÎÅÖпÉÄÜÓжàÕÅͼƬ£¬ËùÒÔBÖлá³öÏÖ¶à¸öͼƬ±àºÅ¶ÔÒ»¸öÐÂÎűàºÅµÄÇé¿ö¡£
Çó´´½¨C±í£¨ÊÓͼ£©µÄsqlÓï¾ä¡£
SQL code:
select
b.pictureid as ͼƬ±àºÅ,a.newstitle as ÐÂÎűêÌâ,a.n ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ