MysqlÃüÁî
MySQL ÃüÁîÐÐ
µÚÒ»ÕС¢mysql·þÎñµÄÆô¶¯ºÍÍ£Ö¹
net stop mysql
net start mysql
µÚ¶þÕС¢µÇ½mysql
Óï·¨ÈçÏ£º mysql -uÓû§Ãû -pÓû§ÃÜÂë
¼üÈëÃüÁîmysql -uroot -p£¬ »Ø³µºóÌáʾÄãÊäÈëÃÜÂ룬ÊäÈë12345£¬È»ºó»Ø³µ¼´¿É½øÈëµ½mysqlÖÐÁË£¬mysqlµÄÌáʾ·ûÊÇ£º
mysql>
×¢Ò⣬Èç¹ûÊÇÁ¬½Óµ½ÁíÍâµÄ»úÆ÷ÉÏ£¬ÔòÐèÒª¼ÓÈëÒ»¸ö²ÎÊý-h»úÆ÷IP
µÚÈýÕС¢Ôö¼ÓÐÂÓû§
¸ñʽ£ºgrant ȨÏÞ on Êý¾Ý¿â.* to Óû§Ãû@µÇ¼Ö÷»ú identified by "ÃÜÂë"
È磬Ôö¼ÓÒ»¸öÓû§user1ÃÜÂëΪpassword1£¬ÈÃÆä¿ÉÒÔÔÚ±¾»úÉϵǼ£¬ ²¢¶ÔËùÓÐÊý¾Ý¿âÓвéѯ¡¢²åÈë¡¢Ð޸ġ¢É¾³ýµÄȨÏÞ¡£Ê×ÏÈÓÃÒÔrootÓû§Á¬Èëmysql£¬È»ºó¼üÈëÒÔÏÂÃüÁ
grant select,insert,update,delete on *.* to user1@localhost Identified by "password1";
Èç¹ûÏ£Íû¸ÃÓû§Äܹ»ÔÚÈκλúÆ÷Éϵǽmysql£¬Ôò½«localhost¸ÄΪ"%"¡£
Èç¹ûÄã²»Ïëuser1ÓÐÃÜÂ룬¿ÉÒÔÔÙ´òÒ»¸öÃüÁÃÜÂëÈ¥µô¡£
grant select,insert,update,delete on mydb.* to user1@localhost identified by "";
µÚËÄÕУº ²Ù×÷Êý¾Ý¿â
µÇ¼µ½mysqlÖУ¬È»ºóÔÚmysqlµÄÌáʾ·ûÏÂÔËÐÐÏÂÁÐÃüÁÿ¸öÃüÁîÒԷֺŽáÊø¡£
1¡¢ ÏÔʾÊý¾Ý¿âÁÐ±í¡£
show databases;
ȱʡÓÐÁ½¸öÊý¾Ý¿â£ºmysqlºÍtest¡£ mysql¿â´æ·Å×ÅmysqlµÄϵͳºÍÓû§È¨ÏÞÐÅÏ¢£¬ÎÒÃǸÄÃÜÂëºÍÐÂÔöÓû§£¬Êµ¼ÊÉϾÍÊǶÔÕâ¸ö¿â½øÐвÙ×÷¡£
2¡¢ ÏÔʾ¿âÖеÄÊý¾Ý±í£º
use mysql;
show tables;
3¡¢ ÏÔʾÊý¾Ý±íµÄ½á¹¹£º
describe ±íÃû;
4¡¢ ½¨¿âÓëɾ¿â£º
create database ¿âÃû;
drop database ¿âÃû;
5¡¢ ½¨±í£º
use ¿âÃû;
create table ±íÃû(×Ö¶ÎÁбí);
drop table ±íÃû;
6¡¢ Çå¿Õ±íÖмǼ£º
delete from ±íÃû;
7¡¢ ÏÔʾ±íÖеļǼ£º
select * from ±íÃû;
µÚÎåÕС¢µ¼³öºÍµ¼ÈëÊý¾Ý
1. µ¼³öÊý¾Ý£º
mysqldump --opt test > mysql.test
¼´½«Êý¾Ý¿âtestÊý¾Ý¿âµ¼³öµ½mysql.testÎļþ£¬ºóÕßÊÇÒ»¸öÎı¾Îļþ
È磺mysqldump -u root -p123456 --databases dbname > mysql.dbname
¾ÍÊÇ°ÑÊý¾Ý¿âdbnameµ¼³öµ½Îļþmysql.dbnameÖС£
2. µ¼ÈëÊý¾Ý:
mysqlimport -u root -p123456 < mysql.dbname¡£
²»ÓýâÊÍÁË°É¡£
3. ½«Îı¾Êý¾Ýµ¼ÈëÊý¾Ý¿â:
Îı¾Êý¾ÝµÄ×Ö¶ÎÊý¾ÝÖ®¼äÓÃtab¼ü¸ô¿ª¡£
use test;
load data local infile "ÎļþÃû" into table ±íÃû;
1:ʹÓÃSHOWÓï¾äÕÒ³öÔÚ·þÎñÆ÷Éϵ±Ç°´æÔÚʲôÊý¾Ý¿â£º
mysql> SHOW DATABASES;
2:2¡¢´´½¨Ò»¸öÊý¾Ý¿âMYSQLDATA
mysql> CREATE DATABASE M
Ïà¹ØÎĵµ£º
MySQL£ºÈÕÆÚº¯Êý¡¢Ê±¼äº¯Êý×ܽᣨMySQL 5.X£©
²Î¿¼³¤ÎÄ£º
Ò»¡¢MySQL »ñµÃµ±Ç°ÈÕÆÚʱ¼ä º¯Êý
1.1 »ñµÃµ±Ç°ÈÕÆÚ+ʱ¼ä£¨date + time£©º¯Êý£ºnow()
mysql> select now();
+---------------------+
| now() |
+---------------------+
| 2008-08-08 22:20:46 |
+---------------------+
³ýÁË now() º¯ÊýÄÜ»ñµÃµ±Ç°µ ......
»·¾³£ºRHEL 5.3
°²×°ÁËMySQLÖ®ºó£¬MySQLµÄrootÓû§Ä¬ÈÏÊDz»¿ª·ÅÔ¶³Ì·ÃÎÊȨÏ޵ġ£ÎªÁË¿ª·ÅËü£¬Ö»ÐèÒªÁ½²½£º
ÓÃLinuxϵͳµÄrootÓû§µÇ¼ϵͳ£¬È»ºó£º
£¨1£©¿ª·Å3306¶Ë¿ÚµÄÔ¶³ÌÁ¬½ÓȨÏÞ£º
ÔÚ“-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited”ÕâÒ»ÐеÄÉÏÃ棨עÒ⣬һ¶¨ÊÇÉÏÃ棩£¬Ìí¼ÓÈçÏ ......
ʹÓÃÕûÊýÊý¾ÝµÄ¾«È·Êý×ÖÊý¾ÝÀàÐÍ¡£
bigint
´Ó -2^63 (-9223372036854775808) µ½ 2^63-1 (9223372036854775807) µÄÕûÐÍÊý¾Ý£¨ËùÓÐÊý×Ö£©¡£´æ´¢´óСΪ 8 ¸ö×Ö½Ú¡£
int
´Ó -2^31 (-2,147,483,648) µ½ 2^31 - 1 (2,147,483,647) µÄÕûÐÍÊý¾Ý£¨ËùÓÐÊý×Ö£©¡£´æ´¢´óСΪ 4 ¸ö×Ö½Ú¡£int µÄ SQL-92 ͬÒå×ÖΪ integer¡£
smallin ......
°²×°ºÃmysqlºó£¬ÔÚʹÓÃmysqʱ£¬³öÏÖÁËÈçÏÂÎÊÌâ.
java.sql.SQLException: Communication failure during handshake. Is there a server running on localhost:3306?
at org.gjt.mm.mysql.MysqlIO.init(MysqlIO.java:327)
at org.gjt.mm.mysql.Connection.connectionInit(Connection.java:261)
at org.gjt.mm.mysql.jdbc2 ......
ÖÐÎÄÏÔʾÎÊÌâÒ»Ö±ÊÇÀ§ÈÅÎÒÃǵÄÒ»¸öÄÑÌ⣬²»ÐÅÄãÉÏgoogleËÑË÷һϣ¬ÕâÀàµÄÎÊÌâºÍ½â´ð¿ÉÒÔ˵ÊÇÆÌÌì¸ÇµØ£¬ºÃ¶àÍøÕ¾ÉõÖÁ½«ÆäÌá³öÀ´×÷ΪרÌâÀ´ÌÖÂÛ£¬¹ÜÖпú±ª£¬¿É¼ûÒ»°ß¡£
¿ªÊ¼Ò²ÔøΪÕâ¸öÎÊÌâÍ·ÌÛ£¬ÉÏÍø²éÔÄ´óÁ¿µÄ×ÊÁϺͽâ¾ö·½·¨£¬ÖÕÓÚÕÒµ½ÁËÒ»Öּȼòµ¥ÓÖºÃÓõİ취£¬ÒÔJSP+MYSQL´æ´¢ÎªÀý£¬¼òµ¥½éÉÜÒ ......