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

½âÊÍ·ÖÎöMySQLÊý¾ÝÀàÐÍ

 
Êý¾Ý¿â´æ´¢ÖеÄÊý¾ÝÀàÐÍÓë´óС¸÷Òì¡£ÓÐЩµØ·½Ö»´æ´¢Êý×ÖÀàÐÍ£¬ÓÐЩֻ´æ´¢Îı¾ÀàÐÍ£¬ÓÐЩ¶þÕß¶ø¼æÖ®¡£¶øºÜ¶àÊý¾Ý¿âÖ§³Ö¸÷ÖÖרÓÃÀàÐÍ£ºÈÕÆÚºÍʱ¼äÀàÐÍ£¬¶þ½øÖÆ×Ö·ûÀàÐÍÒÔ¼°²¼¶ûÀàÐÍ¡£Ñ¡ÔñÊý¾ÝÀàÐÍÓëÊý¾ÝÏàÆ¥ÅäÊÇÊý¾Ý¿âÉè¼ÆÖÐ×îÎªÖØÒªµÄ²¿·Ö£¬ÒòΪÕâÖÖÀàÐͽ«»áÓ°Ïìµ½RDBMSµÄЧÂÊÓëÐÔÄÜ¡£ËùÒÔ£¬¶ÔRDBMSµÄÊý¾ÝÀàÐÍÑ¡ÔñÓ¦ ......

Mysql·þÎñ°²×°ºÍÐ¶ÔØÃüÁî

ÆäʵÈç¹ûÄã·þÎñÆ÷ÖØÐ°²×°ÁË,Ò²²»±ØÖØÐ°²×°mysql ¼¸¸öСÃüÁî¾Í¸ã¶¨ÁË
Ê×ÏÈÊǰ²×°mysql·þÎñ:
mysql-nt –install
net start  mysql
µ±È»Ó´ÔÚbinĿ¼ÔËÐÐÕâ¸öÃüÁîÁË
Ð¶ÔØµÄÃüÁîÊÇ:
net stop "MySQL"
mysqld-nt.exe –remove "MySQL"
ΪʲôÓеÄÅóÓÑÐ¶ÔØ²»ÁËÄØ,ÒòΪËûÒѾ­°ÑÔ´Îļþ¶¼É¾³ýÁË »òÕßÔËÐÐÐ ......

mysql Óï·¨

Transact_SQLСÊÖ²á
*******************Transact_SQL********************
--Óï ¾ä                                ¹¦ ÄÜ
--Êý¾Ý²Ù×÷
SELECT & ......

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¡£ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ