安裝直接yum?install?mysql-server

yum?install?mysql

service?mysqld?start?//啟動mysql服務(wù)

登錄mysql?-u?root?-p

初次設(shè)置密碼set?password?=password('qwer,1234');

flush?privileges;

GRANT?ALL?PRIVILEGES?ON?*.*?TO?'root'@'localhost'?IDENTIFIED?BY?'MyPassword'?WITH?GRANT?OPTION;

FLUSH?PRIVILEGES;

遠程連接use?mysql;

update?user?set?host?=?'%'?where?user?=?'root';

數(shù)據(jù)庫里面修改密碼use?mysql；

update?mysql.user?set?Password=password("123456")?where?User="root";?修改密碼

flush?privileges;

卸載1.關(guān)閉目前的mysql服務(wù)

/etc/init.d/mysqld?stop

2.確保已正常關(guān)閉

ps?-ef?|?grep?mysql

如果沒關(guān)閉，kill之

3.?查詢mysql的安裝情況：

rpm?-qa?|?grep?mysql

將列出來的刪除。

rpm?-e?mysql-server-5.0.95-5.el5_9

rpm?-e?perl-DBD-MySQL-3.0007-2.el5.i386

如果報有多個，則用項?--allmatches將其全部刪掉

查看版本select?version();

查看編碼show?variables?like?'%char%';

修改配置文件設(shè)置編碼?my.cnf 在etc目錄下[client]

default-character-set=utf8

[mysqld_safe]

default-character-set=utf8

[mysqld]

default-character-set=utf8

[mysql]

default-character-set=utf8

命令行設(shè)置編碼，mysql重啟之后不起作用set?character_set_client=utf8;

set?character_set_connection=utf8;

set?character_set_database=utf8;

set?character_set_results=utf8;

set?character_set_server=utf8;

查看目錄show?variables?like?'%dir%';

備份數(shù)據(jù)庫 直接輸入命令，生成的文件在該用戶目錄下mysqldump?-u?用戶名?-p?數(shù)據(jù)庫?>?數(shù)據(jù)庫.sql

執(zhí)行sql文件，登錄mysqlsource?/var/ftp/pub/test.sql;

查看數(shù)據(jù)庫數(shù)據(jù)容量1、進去指定schema?數(shù)據(jù)庫(存放了其他的數(shù)據(jù)庫的信息)

use?information_schema;

2、查詢所有數(shù)據(jù)的大小

select?concat(round(sum(DATA_LENGTH/1024/1024),2),'MB')?as?data?from?TABLES;

3、查看指定數(shù)據(jù)庫的大小

比如說?數(shù)據(jù)庫apoyl

select?concat(round(sum(DATA_LENGTH/1024/1024),2),'MB')?as?data?from?TABLES?where?table_schema='apoyl';

4、查看指定數(shù)據(jù)庫的表的大小

比如說?數(shù)據(jù)庫apoyl?中apoyl_test表

select?concat(round(sum(DATA_LENGTH/1024/1024),2),'MB')?as?data?from?TABLES?where?table_schema='apoyl'?and?table_name='apoyl_test';

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