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

SQL Server 2005 ÖÐ ROW_NUMBER() º¯ÊýµÄ¼òµ¥Ó÷¨

±íÃû£ºd_ClientInfo
Óï¾ä×÷ÓãºÈ¡³öµÚ100-120ÌõÊý¾Ý
 SELECT *
from (SELECT ROW_NUMBER() OVER (ORDER BY ClientID ASC) AS ROWID, * from d_ClientInfo) AS tmpTable
WHERE ROWID BETWEEN 100 AND 120
´Ëº¯Êý»áΪÊý¾Ý±íÖØÐ±àºÅ²¢Ð½¨Êý¾ÝÁÐROWID£¬²»ÐèÒªµÄÆÁ±Îµô¾ÍOKÁË¡£


Ïà¹ØÎĵµ£º

ËѼ¯µÄһЩLINQ to SQLµÄ×ÊÁÏ

MSDN: http://msdn.microsoft.com/en-us/library/bb386976.aspx £¨Ó¢ÎÄ£©
           http://msdn.microsoft.com/zh-cn/library/bb386976.aspx £¨ÖÐÎÄ£©
ScottGu µÄLINQ ϵÁУº
Part 1: Introduction to LINQ to SQL
Part 2: Defining our Dat ......

£¨×ª£©SQL²éѯÂýµÄ48¸öÔ­Òò·ÖÎö

ת×Ô£ºhttp://topic.csdn.net/u/20100109/09/70f82fb7-eabc-4140-9573-5f8395e0f62e.html
²éѯËÙ¶ÈÂýµÄÔ­ÒòºÜ¶à£¬³£¼ûÈçϼ¸ÖÖ£º
¡¡¡¡1¡¢Ã»ÓÐË÷Òý»òÕßûÓÐÓõ½Ë÷Òý(ÕâÊDzéѯÂý×î³£¼ûµÄÎÊÌ⣬ÊdzÌÐòÉè¼ÆµÄȱÏÝ)
¡¡¡¡2¡¢I/OÍÌÍÂÁ¿Ð¡£¬ÐγÉÁËÆ¿¾±Ð§Ó¦¡£
¡¡¡¡3¡¢Ã»Óд´½¨¼ÆËãÁе¼Ö²éѯ²»ÓÅ»¯¡£
¡¡¡¡4¡¢ÄÚ´æ²»×ã
¡¡¡ ......

SQLÓï¾äÓÅ»¯·½·¨30Àý

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*/
±íÃ÷¶ÔÓï¾ ......

SQL³£ÓÃÈÕÆÚʱ¼ä´¦Àíº¯Êý

×î½üÔÚÔÚÒ»µçÁ¦ÏµÍ³£¬ÀïÃæÓõ½±¨±í£¬¾­³£ÐèÒª¶ÔSQLÈÕÆÚ½øÐвÙ×÷¡£ÏÖÔÚ½«Ò»Ð©³£ÓõÄSQLÈÕÆÚ²Ù×÷º¯Êý¼ÇÏÂ
/**//**//**//* datepart()º¯ÊýµÄʹÓà                     ¡¡¡¡
* datepart()º¯Êý¿ÉÒÔ·½±ãµÄÈ¡µ ......

SQLÀïµÄEXISTSÓëin¡¢not existsÓënot in

SQLÀïµÄEXISTSÓëin¡¢not existsÓënot in
ϵͳҪÇó½øÐÐSQLÓÅ»¯£¬¶ÔЧÂʱȽϵ͵ÄSQL½øÐÐÓÅ»¯£¬Ê¹ÆäÔËÐÐЧÂʸü¸ß£¬ÆäÖÐÒªÇó¶ÔSQLÖеIJ¿·Öin/not inÐÞ¸ÄΪexists/not exists
Ð޸ķ½·¨ÈçÏ£º
inµÄSQLÓï¾ä
SELECT id, category_id, htmlfile, title, convert(varchar(20),begintime,112) as pubtime
from tab_oa_pub WHERE ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ