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

Ô¶³ÌÁ¬½Ó MySQL l×ÊÁÏ zz


Ô¶³ÌÁ¬½Ómysql×ÊÁÏ
Ô¶³ÌÁ¬½Óµ½mysqlÐèÒª×öµÄ£º
1¡¢½øÈëmysql£¬´´½¨Ò»¸öÐÂÓû§xuys£º
¸ñʽ£ºgrant ȨÏÞ on Êý¾Ý¿âÃû.±íÃû Óû§@µÇ¼Ö÷»ú identified by "Óû§ÃÜÂë";
grant select,update,insert,delete on *.* to xuys@192.168.88.234 identified by "xuys1234";
²é¿´½á¹û£¬Ö´ÐУº
   use mysql;
   select host,user,password from user;
   ¿ÉÒÔ¿´µ½ÔÚuser±íÖÐÒÑÓиղŴ´½¨µÄxuysÓû§¡£host×ֶαíʾµÇ¼µÄÖ÷»ú£¬ÆäÖµ¿ÉÒÔÓÃIP£¬Ò²¿ÉÓÃÖ÷»úÃû£¬½«host×ֶεÄÖµ¸ÄΪ%¾Í±íʾÔÚÈκοͻ§¶Ë»úÆ÷ÉÏÄÜÒÔxuysÓû§µÇ¼µ½mysql·þÎñÆ÷£¬½¨ÒéÔÚ¿ª·¢Ê±ÉèΪ%¡£
   update user set host = '%' where user = 'xuys';
2¡¢ ./mysqladmin -uroot -ppwd reload
./mysqladmin -uroot -ppwd shutdown
3¡¢./mysqld_safe --user=root &
¼Çס£º¶ÔÊÚȨ±íµÄÈκÎÐ޸ͼÐèÒªÖØÐÂreload£¬¼´Ö´ÐеÚ3²½¡£
Èç¹û¾­¹ýÒÔÉÏ3¸ö²½Ö軹ÊÇÎÞ·¨´Ó¿Í»§¶ËÁ¬½Ó£¬ÇëÖ´ÐÐÒÔϲÙ×÷£¬ÔÚmysqlÊý¾Ý¿âµÄdb±íÖвåÈëÒ»Ìõ¼Ç¼£º
use mysql;
insert into db
values('192.168.88.234','%','xuys','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y');
update db set host = '%' where user = 'xuys';
ÖØ¸´Ö´ÐÐÉÏÃæµÄµÚ2¡¢3²½¡£


Ïà¹ØÎĵµ£º

mysql µ¼ÈëÊý¾Ý LOAD DATA LOCAL INFILE

Äã¿ÉÒÔ´´½¨Ò»¸öÎı¾Îļþ“pet.txt”£¬Ã¿Ðаüº¬Ò»¸ö¼Ç¼£¬Óö¨Î»·û(tab)°ÑÖµ·Ö¿ª£¬²¢ÇÒÒÔCREATE TABLEÓï¾äÖÐÁгöµÄÁдÎÐò¸ø³ö¡£¶ÔÓÚ¶ªÊ§µÄÖµ(ÀýÈçδ֪µÄÐԱ𣬻òÈÔÈ»»î×ŵ͝ÎïµÄËÀÍöÈÕÆÚ)£¬Äã¿ÉÒÔʹÓÃNULLÖµ¡£ÎªÁËÔÚÄãµÄÎı¾ÎļþÖбíʾÕâЩÄÚÈÝ£¬
ʹÓÃ\N£¨·´Ð±Ïߣ¬×ÖĸN£©¡£ÀýÈ磬WhistlerÄñµÄ¼Ç¼ӦΪ(ÕâÀïÖµÖ® ......

mysqlÀàÐÍת»»

MYSQL Castº¯Êý ÀàÐÍת»»
BINARY
BINARY²Ù×÷·û½«ºóÃæµÄ×Ö·û´®Å׸øÒ»¸ö¶þ½øÖÆ×Ö·û´®¡£ÕâÊÇÒ»ÖÖ¼òµ¥µÄ·½Ê½À´´ÙʹÖð×Ö½Ú¶ø²»ÊÇÖð×Ö·ûµÄ½øÐÐÁбȽϡ£ÕâʹµÃ±È½ÏÇø·Ö´óСд£¬¼´Ê¹¸ÃÁв»±»¶¨ÒåΪ BINARY»ò BLOB¡£BINARYÒ²»á²úÉú½áβ¿Õ°×£¬´Ó¶ø¸ü¼ÓÏÔÑÛ¡£
mysql> SELECT 'a' = 'A';
-> 1
mysql> SELECT BINARY ' ......

MySQLµÄfrom_UNIXTIME()ºÍUNIX_TIMESTAMP()º¯ÊýµÄÇø±ð

from_unixtime()ÊÇMySQLÀïµÄʱ¼äº¯Êý
dateΪÐèÒª´¦ÀíµÄ²ÎÊý(¸Ã²ÎÊýÊÇUnix ʱ¼ä´Á),¿ÉÒÔÊÇ×Ö¶ÎÃû,Ò²¿ÉÒÔÖ±½ÓÊÇUnix ʱ¼ä´Á×Ö·û´®
ºóÃæµÄ '%Y%m%d' Ö÷ÒªÊǽ«·µ»ØÖµ¸ñʽ»¯
ÀýÈç:
mysql>SELECT from_UNIXTIME( 1249488000, '%Y%m%d' )  
->20071120
mysql>SELECT from_UNIXTIME( 1249488000, '%YÄê%mÔ ......

mysql ´æ´¢ÒýÇæ

Õâ¶Îʱ¼äÔÚ¿´¡¶High Performance MySQL¡·£¬¿´µ½´æ´¢ÒýÇæÕâ¸öµØ·½¸Ðµ½ºÜ¶àϸ½Ú±È½ÏİÉú£¬ËùÒÔ×ܽáС¼ÇһЩ
ΪÁËÊÊÓ¦¸÷ÖÖ²»Í¬µÄÔËÐл·¾³£¬MYSQLÌṩÁ˶àÖÖ²»Í¬µÄ´æ´¢ÒýÇæ£¨Storage Engine
£©,ÔÚÓ¦ÓóÌÐò¿ª·¢Õâ¸ö²ãÃæÉÏ£¬¿ª·¢Õß¿ÉÒÔ¸ù¾Ý²»Í¬µÄÐèÇóÑ¡ÔñÊʺϵÄStorage Engine
·½°¸£¬¸üΪÁé»îµÄÊÇ£¬Äã¿ÉÒÔ¸ù¾ÝÿÕÅ±í½«Òª´æ´¢Êý ......

15.2.6.5. InnoDBºÍMySQL¸´ÖÆ


15.2.6.5. InnoDBºÍMySQL¸´ÖÆ
MySQL¸´ÖƾÍÏñ¶ÔMyISAM±íÒ»Ñù£¬Ò²¶ÔInnoDB±íÆð×÷Óá£ÒÔijÖÖ·½Ê½Ê¹Óø´ÖÆÒ²ÊÇ¿ÉÄܵģ¬ÔÚÕâÖÖ·½Ê½ÖдӷþÎñÆ÷ÉϱíµÄÀàÐͲ»Í¬ÓÚÖ÷·þÎñÆ÷ÉÏԭʼ±íµÄÀàÐÍ¡£ÀýÈ磬Äã¿ÉÒÔ¸´ÖÆÐ޸ĵ½Ö÷·þÎñÆ÷ÉÏÒ»¸öInnoDB±í£¬µ½´Ó·þÎñÆ÷ÉÏÒ»¸öMyISAM±íÀï¡£
ҪΪһ¸öÖ÷·þÎñÆ÷½¨Á¢Ò»¸öзþÎñÆ÷£¬Äã²»µÃ²»¸´ÖÆIn ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ