概述

今天主要介紹下mysqldump怎么遷移編碼不同的數據庫,這里用一個實驗來演示一下。

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1、創建測試數據庫

create database t1 default character set gbk collate gbk_chinese_ci;create database t2 default character set utf8 collate utf8_general_ci;use t1;create table t11(id int,name varchar(10),primary key(id)) engine=innodb default charset=utf8;create table t12(id int,name varchar(10),primary key(id)) engine=innodb default charset=gb2312;use t2;create table t21(id int,name varchar(10),primary key(id)) engine=innodb default charset=utf8;create table t22(id int,name varchar(10),primary key(id)) engine=innodb default charset=gb2312;

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2、模擬數據

use t1;insert into t11 values(1,'hwb');insert into t11 values(2,'hwb2');insert into t12 values(1,'hwb');insert into t12 values(2,'hwb2');?use t2;insert into t21 values(1,'hwb');insert into t21 values(2,'hwb2');insert into t22 values(1,'hwb');insert into t22 values(2,'hwb2');

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3、導出數據庫

mysqldump -u root -p t1 > /tmp/t1_old.sqlmysqldump -u root -p t2 > /tmp/t2_old.sql

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4、轉換編碼

--如果你是想轉成utf-8,就在t參數后面寫上。以前字符集是gb2312就在-f參數后面寫上。iconv -t utf-8 -f gb2312 -c /tmp/t1_old.sql > /tmp/t1_new_utf8.sqliconv -t utf-8 -f gb2312 -c /tmp/t2_old.sql > /tmp/t2_new_utf8.sql

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5、修改 /tmp/new_utf8.sql文件的字符編碼

sed 's/CHARSET=gbk/CHARSET=utf8/g' /tmp/t1_new_utf8.sql > /tmp/t1_new_utf8_new.sqlsed 's/CHARSET=gb2312/CHARSET=utf8/g' /tmp/t1_new_utf8_new.sql > /tmp/t1_new_utf8_new2.sql?sed 's/CHARSET=gbk/CHARSET=utf8/g' /tmp/t2_new_utf8.sql > /tmp/t2_new_utf8_new.sqlsed 's/CHARSET=gb2312/CHARSET=utf8/g' /tmp/t2_new_utf8_new.sql > /tmp/t2_new_utf8_new2.sql

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6、建新庫

create database t3 default character set utf8 collate utf8_general_ci;create database t4 default character set utf8 collate utf8_general_ci;

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7、導入

use t3;source /tmp/t1_new_utf8_new2.sql;use t4;source /tmp/t2_new_utf8_new2.sql;

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8、測試

到這里就完成了數據庫及表不同字符集的遷移測試。

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總結

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