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

²é³öË­µÄ½±½ð×ܺÏÊÇ×î¸ßµÄ£¬SQLÓï¾ä

 Ô­ÎÄ´«ËÍÃÅ£ºhttp://topic.csdn.net/u/20091119/17/388cd1dd-4018-403f-a97f-0bc135895264.html?85256
Êý¾Ý¿âÀýÈç:
id      ÐÕ  Ãû  ½±  ½ð
1        ÕÅÈý    20Íò
2        ÀîËÄ    10Íò
3        ÍõÒ»    5Íò
4        ÍõÒ»    50Íò
5        ÀîËÄ    6Íò
ÎÒҪʵÏÖÏÂÃæµÄЧ¹û
id      ÐÕ  Ãû  ½±  ½ð
4        ÍõÒ»      55Íò
²é³öË­µÄ½±½ð×ܺÏÊÇ×î¸ßµÄ£¬SQLÓï¾äÓ¦¸ÃÔõôд
½¨±íÓï¾ä
-- Create table
create table TEST111
(
ID NUMBER,
NAME VARCHAR2(10),
T NUMBER
)
SQLÓï¾ä
SELECT A.ID, A.NAME, A.T, A.AA
from (SELECT T.ID, T.NAME, T.T, SUM(T.T) OVER(PARTITION BY T.NAME) AS AA
from TEST111 T
ORDER BY AA DESC

) A
WHERE ROWNUM = 1


Ïà¹ØÎĵµ£º

³£¼ûOracle HINTµÄÓ÷¨ SQLÓÅ»¯

ÔÚSQLÓï¾äÓÅ»¯¹ý³ÌÖУ¬ÎÒÃǾ­³£»áÓõ½hint,ÏÖ×ܽáÒ»ÏÂÔÚSQLÓÅ»¯¹ý³ÌÖг£¼ûOracle HINTµÄÓ÷¨£º
1. /*+ALL_ROWS*/
±íÃ÷¶ÔÓï¾ä¿éÑ¡Ôñ»ùÓÚ¿ªÏúµÄÓÅ»¯·½·¨,²¢»ñµÃ×î¼ÑÍÌÍÂÁ¿,ʹ×ÊÔ´ÏûºÄ×îС»¯.
ÀýÈç:
SELECT /*+ALL+_ROWS*/ EMP_NO,EMP_NAM,DAT_IN from BSEMPMS WHERE EMP_NO=’SCOTT’;
2. /*+FIRST_ROWS*/
±í ......

Access(jet sql)ÓëMS SQL Server(t

 ÍøÉÏËѼ¯£¬±¸ÓÃ
ϱíÁгöÁË ANSI SQL Êý¾ÝÀàÐͺ͵ÈЧµÄ Microsoft Jet Êý¾Ý¿âÒýÇæ SQLÊý¾ÝÀàÐÍ»¹ÓÐËüÃǵÄÓÐЧͬÒå×ÖÒÔ¼° µÈЧµÄ Microsoft SQL ServerÊý¾ÝÀàÐÍ¡£
ANSI SQL
Êý¾ÝÀàÐÍ
Microsoft Access
SQL Êý¾ÝÀàÐÍ
ͬÒå´Ê
Microsoft SQL
Server Êý¾ÝÀàÐÍ
BIT¡¢BIT VARYING
BINARY£¨²Î¼û×¢ÊÍ£©
VARBINARY¡¢ ......

SQL³£ÓÃÃüÁîʹÓ÷½·¨

 
(1) Êý¾Ý¼Ç¼ɸѡ£º
sql="select * from Êý¾Ý±í where ×Ö¶ÎÃû=×Ö¶ÎÖµ order by ×Ö¶ÎÃû [desc]"
sql="select * from Êý¾Ý±í where ×Ö¶ÎÃû like '%×Ö¶ÎÖµ%' order by ×Ö¶ÎÃû [desc]"
sql="select top 10 * from Êý¾Ý±í where ×Ö¶ÎÃû order by ×Ö¶ÎÃû [desc]"
sql="select * from Êý¾Ý±í where ×Ö¶ÎÃû in ('Öµ ......

SQL×¢Èë©¶´È«½Ó´¥

  Ëæ×ÅB/SģʽӦÓÿª·¢µÄ·¢Õ¹£¬Ê¹ÓÃÕâÖÖģʽ±àдӦÓóÌÐòµÄ³ÌÐòÔ±Ò²Ô½À´Ô½¶à¡£µ«ÊÇÓÉÓÚÕâ¸öÐÐÒµµÄÈëÃÅÃż÷²»¸ß£¬³ÌÐòÔ±µÄˮƽ¼°¾­ÑéÒ²²Î²î²»Æë£¬Ï൱´óÒ»²¿·Ö³ÌÐòÔ±ÔÚ±àд´úÂëµÄʱºò£¬Ã»ÓжÔÓû§ÊäÈëÊý¾ÝµÄºÏ·¨ÐÔ½øÐÐÅжϣ¬Ê¹Ó¦ÓóÌÐò´æÔÚ°²È«Òþ»¼¡£Óû§¿ÉÒÔÌá½»Ò»¶ÎÊý¾Ý¿â²éѯ´úÂ룬¸ù¾Ý³ÌÐò·µ»ØµÄ½á¹û£¬»ñµÃijР......

SQL×¢Èë©¶´È«½Ó´¥

 
µÚÒ»½Ú¡¢SQL×¢ÈëµÄÒ»°ã²½Öè
Ê×ÏÈ£¬Åжϻ·¾³£¬Ñ°ÕÒ×¢Èëµã£¬ÅжÏÊý¾Ý¿âÀàÐÍ£¬ÕâÔÚÈëÃÅÆªÒѾ­½²¹ýÁË¡£
Æä´Î£¬¸ù¾Ý×¢Èë²ÎÊýÀàÐÍ£¬ÔÚÄÔº£ÖÐÖØ¹¹SQLÓï¾äµÄԭò£¬°´²ÎÊýÀàÐÍÖ÷Òª·ÖΪÏÂÃæÈýÖÖ£º
(A) ID=49 ÕâÀà×¢ÈëµÄ²ÎÊýÊÇÊý×ÖÐÍ£¬SQLÓï¾äԭò´óÖÂÈçÏ£º
Select * from ±íÃû where ×Ö¶Î=49
×¢ÈëµÄ²ÎÊýΪID=49 And [²é ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ