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

WindowsÏ»·¾³±äÁ¿Ð޸ģ¨Éæ¼°MySQLÃüÁîµÄÖ±½ÓÔËÐУ©


ÓÒ¼üÎҵĵçÄÔ->ÊôÐÔ->¸ß¼¶->»·¾³±äÁ¿
¿ÉÒÔ¿´µ½ÓÐÓû§±äÁ¿ºÍϵͳ±äÁ¿
ÔÚÕâÀïÎÒÃÇ¿ÉÒÔ½øÐÐÐ޸Ļ·¾³±äÁ¿
±ÈÈç˵ÎÒÃǰ²×°ÁËMySQL·þÎñÆ÷£¬Ïë½øÈëMySQLµÄÃüÁîÐеϰ¾Í±ØÐëÔËÐÐcmd
Èç¹ûûÓÐÉèÖû·¾³±äÁ¿µÄ»°ÎÒÃDZØÐë½øÈëMySQLµÄ°²×°Â·¾¶²ÅÄÜʹÓÃmysql -u root -pÕâ¸öÃüÁî
ÕâÑù»á¸øÎÒÃÇ´øÀ´ºÜ¶àÂé·³£¬ÕâʱºòÎÒÃÇÏëÔõô²ÅÄÜ´ò¿ªcmdºóÖ±½ÓÔËÐÐmysql -u root -pÕâ¸öÃüÁî
ÎÒÃǵÄ×ö·¨ÊÇÔÚÓû§±äÁ¿µÄpath±äÁ¿ÖмÓÈëMySQLµÄ°²×°Â·¾¶£¬path±äÁ¿ÖÐÓкܶà±äÁ¿£¬ÐèҪʹÓ÷ֺŷָô
½Ó×ÅÉèÖÃÍê±Ïºó£¬Æô¶¯cmd£¬Ö±½ÓÊäÈëmysql -u root -pÎÒÃDZã¿É½øÈëMySQLµÄÃüÁîÐÐÁË


Ïà¹ØÎĵµ£º

MySQLÈçºÎÀûÓÃË÷ÒýÓÅ»¯ORDER BYÅÅÐòÓï¾ä


MySQLË÷Òýͨ³£ÊDZ»ÓÃÓÚÌá¸ßWHEREÌõ¼þµÄÊý¾ÝÐÐÆ¥Åä»òÕßÖ´ÐÐÁª½á²Ù×÷ʱƥÅäÆäËü±íµÄÊý¾ÝÐеÄËÑË÷ËÙ¶È¡£
MySQLÒ²ÄÜÀûÓÃË÷ÒýÀ´¿ìËÙµØÖ´ÐÐORDER BYºÍGROUP BYÓï¾äµÄÅÅÐòºÍ·Ö×é²Ù×÷¡£
ͨ¹ýË÷ÒýÓÅ»¯À´ÊµÏÖMySQLµÄORDER BYÓï¾äÓÅ»¯£º
1¡¢ORDER BYµÄË÷ÒýÓÅ»¯¡£Èç¹ûÒ»¸öSQLÓï¾äÐÎÈ磺
SELECT [column1],[column2],…. fro ......

MySQLÊý¾Ý¿âÉè¼ÆÔ­Ôò

ת×Ô http://www.supidea.com/post/mysql_design_database.aspx
MySQLÊý¾Ý¿âÉè¼ÆÔ­Ôò
MySQL¶ÔÓÚ³ÉΪһ¸ö·Ç³£¿ìËÙµÄÊý¾Ý¿â·þÎñÆ÷ÓÐ×ŵ±Ö®ÎÞÀ¢µÄÃûÉù£¬ËüÒ²·Ç³£ÈÝÒ×ÉèÖúÍʹÓá£Ëæ×ÅËü×÷ÎªÍøÕ¾ºó¶ËÊý¾Ý¿âµÃÉùÍûÈÕÔö£¬ÆäЧ¹ûÔÚÈ¥Ä꿪ʼÓÐÃ÷ ÏÔÌá¸ß¡£µ«ÊǺܶàMySQLÓû§¸ü¶àµØÖªµÀÈçºÎ´´½¨Ò»¸öÊý¾Ý¿â²¢±àд¶ÔËüµÄ²éѯ¡£¾ÍÏñ³ÉÇ ......

mysql³öÏÖunauthenticated user¼òµ¥·ÖÎöÒÔ¼°½â¾ö

µ±ÓÃshow processlist;¿´µ½ÈçÏÂÐÅϢʱ:
LL | login | NULL             |
| 697 | unauthenticated user | 218.26.219.186:26944  | NULL       | Connect | NULL | login | NULL      & ......

mysql text ³¤¶È


mysql text ³¤¶È
ÎÄÕ·ÖÀà:Êý¾Ý¿â
½ñÌìÔÚ×öDBÉè¼ÆµÄʱºòÔÚÏëÓÃTEXT ÊÇ·ñÄܹ»Âú×㽫À´µÄÊý¾Ý£¬Äܹ»³öÏÖ×°²»ÏµÄÇé¿ö¡£
ºóÀ´²éѯÁËһϹٷ½ÊÖ²áµÃµ½ÁËÒ»¸ö´ð°¸¡£
Ò»¸öBLOB»òTEXTÁУ¬×î´ó³¤¶ÈΪ65535(2^16-1)¸ö×Ö·û¡£
MEDIUMBLOB 
MEDIUMTEXT 
Ò»¸öBLOB»òTEXTÁУ¬×î´ó³¤¶ÈΪ16777215(2^24-1)¸ö×Ö·û¡£
LONG ......

MYSQLÖÐEXPLAINµÄ˵Ã÷


 
mysql> explain select count(id) from t_prehandle_zhigao_05 as zhigao where start_time > '2008-05-30';
+----+-------------+--------+-------+---------------+------------+---------+------+---------+--------------------------+
| id | select_type | table  | type  | p ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ