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

MySQLÊý¾Ý¿âÈÕÖ¾

MySQLÊý¾Ý¿âÈÕÖ¾
selectÈÕÖ¾
slow selectÈÕÖ¾
±ä¸üÈÕÖ¾
¶þ½øÖƱä¸üÈÕÖ¾(binlog)
¸æ¾¯ÈÕÖ¾
´íÎóÈÕÖ¾¡£
¿ÉÒÔÔÚmy.cnfÖÐÅäÖÃ
²ÎÊý
˵Ã÷
log
Îı¾selectÈÕÖ¾£¬¼ÇÏÂËùÓеÄMySQLµÄÃüÁî²Ù×÷£¬
log-update
Îı¾±ä¸üÈÕÖ¾
log-bin
Õâ¸ö¶¼ÖªµÀÁË£¬Êý¾Ý¿â¸´ÖƵÄʱºò±Ø±¸
binlog_cache_size
ÁÙʱ´æ·Åij´ÎÊÂÎñµÄSQLÓï¾ä»º³å³¤¶È
max_binlog_cache_szie
×î´ó¶þ½øÖÆCacheÈÕÖ¾»º³åÇø³ß´ç
max_binlog_size
×î´óµÄ¶þ½øÖÆÈÕÖ¾³ß´ç
log-error
ÑÏÖØ´íÎóÈÕÖ¾
log-warnings
¾¯¸æ¼¶±ðµÄÈÕÖ¾£¬µÍÓÚerror
long_query_time
³¬¹ý¶àÉÙÃë¾ÍÊÇÂý²éѯÓï¾ä
log-queries-not-using-indexes
ûÓÐʹÓÃË÷Òý²éѯµÄÈÕÖ¾,
log-slow-queri
Âý²éѯ£¬Õâ¸öÒ»¶à¾ÍÒªÓÅ»¯ÁË


Ïà¹ØÎĵµ£º

mysqlµÄFIND_IN_SETº¯ÊýʹÓ÷½·¨

mysqlµÄ  find_in_setº¯ÊýʹÓ÷½·¨
ºÜ¶àʱºòÎÒÃÇÔÚÉè¼ÆÊý¾Ý¿âʱÓÐÕâÖÖÇé¿ö,±ÈÈç:
ÓиöÎÄÕ±íÀïÃæÓиötype×Ö¶Î,Ëû´æ´¢µÄÊÇÎÄÕÂÀàÐÍ,ÓÐ 1Í·Ìõ,2ÍÆ¼ö,3Èȵã,4ͼÎÄ .....11,12,13µÈµÈ
ÏÖÔÚÓÐÆªÎÄÕÂËû¼ÈÊÇ Í·Ìõ,ÓÖÊÇÈȵã,»¹ÊÇͼÎÄ,
typeÖÐÒÔ 1,3,4µÄ¸ñʽ´æ´¢.
ÄÇÃÇÎÒÃÇÈçºÎÓÃsql²éÕÒËùÓÐtypeÖÐÓÐ4ͼÎıê×¼µÄÎÄÕÂÄØ ......

LinuxÏÂMysql ÃüÁîÐÐÏÔʾÂÒÂëÎÊÌâ½â¾ö

ÔÚʹÓÃWindowsÃüÁîÐвÙ×÷MySQLÊý¾Ý¿âµÄʱºò£¬ÒÔutf8¸ñʽ´æ´¢ÔÚMySQLÊý¾Ý¿âÖеÄÊý¾Ý£¬´ÓÃüÁîÐжÁÈ¡³öÀ´×ÜÊÇÂÒÂ룬ÏÔʾȫÊÇÎʺš£»òÕß´ÓÃüÁîÐвåÈëÐÂÊý¾Ý£¬½á¹ûÏà·´£¬ÔÚÃüÁîÐÐÖÐÏÔʾÊÇÕý³£µÄ£¬µ«ÊÇÔÚPHPMyAdminÖÐÈ´ÊÇÂÒÂë¡£
¡¡¡¡¾­¹ýÉÏÍø²éÕÒÑо¿£¬·¢ÏÖmysqlµÄÃüÁîÐпͻ§¶Ë¸ù±¾ÎÞ·¨ÒÔutf-8µÄÐÎʽ·µ»ØÊý¾Ý£¬½â¾öÈçÏ¡£
¡¡¡¡² ......

mysqlµ÷Óúó

ÓÃmysql_query£¬mysql_fetch_array()ºóÓ¦¸ÃÒª
free_result().function count_admin($where = '')
{
if($where) $where = " WHERE $where";
$result = $this->db->get_one("SELECT count(*) as num from $this->table_admin_role $where");
return $result['num'];
} ......

Ò»¸ö¸´ÔÓµÄmysql²éѯÓï¾ä(case,when,then,left join )

select `a`.`id` AS `id`,`a`.`UserName` AS `UserName`,
(case when (`a`.`sRegDate` = _utf8'1990-01-01 00:00:00.0') then _utf8'' else cast(date_format(`a`.`sRegDate`,_utf8'%Y-%m-%d %H:%i:%S') as char charset utf8) end) AS `sRegDate`,(case when (`a`.`feeendtime` = _utf8'1990-01-01 00:00:00.0') then _ut ......

MYSQLºÍORACLEµÄһЩ²Ù×÷Çø±ð

MYSQLºÍORACLEµÄһЩ²Ù×÷Çø±ð
ÓкܶàÓ¦ÓÃÏîÄ¿, ¸ÕÆð²½µÄʱºòÓÃMYSQLÊý¾Ý¿â»ù±¾ÉÏÄÜʵÏÖ¸÷ÖÖ¹¦ÄÜÐèÇó£¬Ëæ×ÅÓ¦ÓÃÓû§µÄÔö¶à£¬Êý¾ÝÁ¿µÄÔö¼Ó£¬MYSQL½¥½¥µØ³öÏÖ²»¿°ÖظºµÄÇé¿ö£ºÁ¬½ÓºÜÂýÉõÖÁå´»ú£¬ÓÚÊǾÍÓаÑÊý¾Ý´ÓMYSQLǨµ½ORACLEµÄÐèÇó£¬Ó¦ÓóÌÐòÒ²ÒªÏàÓ¦×öһЩÐ޸ġ£±¾ÈË×ܽá³öÒÔϼ¸µã×¢ÒâÊÂÏϣÍû¶Ô´ó¼ÒÓÐËù°ïÖú¡£
1.×Ô ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ