ÓÐÒ»Õűí(SHGL)
JLBH LXR LXDH SHDZ
1 a 123 ......
if object_id('[tb]') is not null drop table [tb]
go
create table [tb]([name] varchar(6),[team] varchar(20),[num1] int,[num2] int)
insert [tb]
select '³ÂÍñÒÇ','¶«»ªÎ÷·ÖÐÐÁ¬Ð¡Àò×é',4,1 union all
select '³ÂÍñÒÇ','½¨Éè·ÖÐÐÒ¶½£Ãô×é',9,0 unio ......
±íAÖÐÄÚÈÝ:
Id Name
1 aa
2 aa
3 bb
4 cc
5 cc
6 cc
ÓÃÒ»Ìõ²éѯÓï¾ä,·µ»Ø½á¹û:
aa 2
bb 1
cc 3
SQL code:
select name,max(ID)ID from tb group by name
SQL code:
SELECT NAME,MIN(ID)ID from ......
a±í
id name dateTime
1 aa 2009-9-9
2 bb 2009-9-10
3 cc 2009-9-11
4 dd 2009-9-44
5 jj 2009-9-10
²éѯÁÐdateTimeÖеÄÖµ2009-9-11Ò ......
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sql2000ºÃÏñÖ»Äܵ¼Êý¾Ý¿â£¬²»ÖªµÀµÇÈëÓû§Ôõôµ¼Èë¡£Çë¸÷λ¸ø¸ö´ð°¸£¬Ð»Ð»£¡
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¹Ø¼üÊÇÄÇô¶àµÄÓû§£¬¶øÇÒ¶¼ÓÐÃÜÂ룬ÎÒ²»ÄܰÉÃÜÂë¶¼¸ÄÁ˰¡£¬Ã»°ì·¨Öؽ¨Å¶£ ......
2ÕÅ±í£¬Îª¸¸×Ó¹ØÏµ±í£º
1 emp±í [Ô±¹¤]
id Name Age
1 ÕÅÈý 31
2 ÀîËÄ ......