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

MSSQL ʵÏÖ MySQL µÄ limit ²éѯ·½Ê½

MSSQL ÈçºÎʵÏÖ MySQL µÄ limit ²éѯ·½Ê½
²»ÖªÎªºÎ£¬MSSQL ÖÐûÓÐ limit Õâ¸ö¼«ÎªÖØÒªµÄ²éѯ·½Ê½£¬ÊìϤ MySQL µÄÅóÓѶ¼ÖªµÀ£¬MySQL µÄ limit ¶ÔÓÚʵÏÖ·ÖÒ³ºÍһЩÏÞÖÆ½á¹û¼¯µÄÓ¦ÓÃÖзdz£·½±ã¡£Ã»Óв»Òª½ô£¬ÎÒÃÇ¿ÉÒÔÓÃÆäËû·½·¨´ïµ½Í¬ÑùµÄÄ¿µÄ£¬×Ô¼º¶¯ÊÖ£¬·áÒÂ×ãʳ£¡
Óï·¨£º
Code:
SELECT * from
(
     SELECT TOP [ÿҳ¼Ç¼]
* from
     (
         SELECT TOP [ÿҳ¼Ç¼*µ±Ç°Ò³Êý]
[×Ö¶Î1, ×Ö¶Î2, ...]

         from [Êý¾Ý±í]
    
         ORDER BY [ÅÅÐò×Ö¶Î]
DESC
     )
    [±í±ðÃû1]
     ORDER BY [ÅÅÐò×Ö¶Î]
)
[±í±ðÃû2]

ORDER BY [ÅÅÐò×Ö¶Î]
DESC
ʾÀý£º
Code:
SELECT * from
(
     SELECT TOP 5 * from
     (
         SELECT TOP 10 *
         from table
         ORDER BY id DESC
     ) t1
     ORDER BY id
) t2
ORDER BY id DESC
ÉÏÃæµÄ´úÂë±íʾ´Ó table ±íÖлñÈ¡¼Ç¼£¬Ã¿Ò³5Ìõ¼Ç¼£¬µ±Ç°ÊǵڶþÒ³5*2=10£¬½á¹û°´ÕÕ id µ¹ÐòÅÅÁС£


Ïà¹ØÎĵµ£º

Êý¾Ý¿âÁ¬½Ó×Ö·û´®´óÈ«(MySQL)


 Êý¾Ý¿âÁ¬½Ó×Ö·û´®´óÈ«(MySQL)   
 
 MyODBC 
 MyODBC 2.50 Local database:
"Driver={mySQL};Server=localhost;Option=16834;Database=mydatabase;"
MyODBC 2.50 Remote database:
"Driver={mySQL};Server=data.domain.com;Port=3306;Option=131072;Stmt=;Database=my-databa ......

Mysql³£¼ûµÄ¼¸ÖÖÊý¾Ý¿âÀàÐͽâÊÍ

ISAM
ISAMÊÇÒ»¸ö¶¨ÒåÃ÷È·ÇÒÀú¾­Ê±¼ä¿¼ÑéµÄÊý¾Ý±í¸ñ¹ÜÀí·½·¨£¬ËüÔÚÉè¼ÆÖ®Ê±¾Í¿¼Âǵ½Êý¾Ý¿â±»²éѯµÄ´ÎÊýÒªÔ¶´óÓÚ¸üеĴÎÊý¡£Òò´Ë£¬ISAMÖ´ÐжÁÈ¡²Ù×÷µÄËٶȺܿ죬¶øÇÒ²»Õ¼ÓôóÁ¿µÄÄÚ´æºÍ´æ´¢×ÊÔ´¡£ISAMµÄÁ½¸öÖ÷Òª²»×ãÖ®´¦ÔÚÓÚ£¬Ëü²»Ö§³ÖÊÂÎñ´¦Àí£¬Ò²²»Äܹ»ÈÝ´í£ºÈç¹ûÄãµÄÓ²Å̱ÀÀ£ÁË£¬ÄÇôÊý¾ÝÎļþ¾ÍÎÞ·¨»Ö¸´ÁË¡£Èç¹ûÄãÕýÔÚ°Ñ ......

MySQLÊý¾ÝÀàÐÍ

ÊýÖµÀàÐÍ
¡¡¡¡MySQL
µÄÊýÖµÊý¾ÝÀàÐÍ¿ÉÒÔ´óÖ»®·ÖΪÁ½¸öÀà±ð£¬Ò»¸öÊÇÕûÊý£¬ÁíÒ»¸öÊǸ¡µãÊý»òСÊý¡£Ðí¶à²»Í¬µÄ×ÓÀàÐͶÔÕâЩÀà±ðÖеÄÿһ¸ö¶¼ÊÇ¿ÉÓõģ¬Ã¿¸ö×ÓÀàÐÍÖ§³Ö²»Í¬´óСµÄÊý¾Ý£¬²¢ÇÒ
MySQL ÔÊÐíÎÒÃÇÖ¸¶¨ÊýÖµ×Ö¶ÎÖеÄÖµÊÇ·ñÓÐÕý¸ºÖ®·Ö»òÕßÓÃÁãÌî²¹¡£
¡¡¡¡±íÁгöÁ˸÷ÖÖÊýÖµÀàÐÍÒÔ¼°ËüÃǵÄÔÊÐí·¶Î§ºÍÕ¼ÓõÄÄÚ´æ¿Õ¼ä¡£ ......

mysql Íü¼ÇROOTÃÜÂëµÄ¼òµ¥½â¾ö·½°¸

1.Í£µômysqld
  service mysqld stop
2.ÖØÆômysqld£¬Ö¸¶¨²ÎÊý
  service mysqld start --skip-networking --skip-grant-tables
  »òÕß
  /opt/mysql/bin/mysqld_safe --skip-networking --skip-grant-tables &
  /opt/mysql/ÊÇÎÒµÄMYSQL°²×°Â·¾¶
  skip-grant-tables:Á¬½ÓÊ±Ìø¹ýÊ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ