如何将mysql数据库中的MyISAM类型表更改为InnoDB类型的表
改单个表改多个表修改为InnoDB修改为MyISAM
批量修改mysql数据库字符集Mysql修改表、字段、库的字符集
改单个表
ALTER TABLE TABLENAME ENGINE=InnoDB
;
ALTER TABLE TABLENAME ENGINE=MyISAM
;
改多个表
修改为InnoDB
SELECT CONCAT( 'ALTER TABLE ', TABLE_NAME, ' ENGINE=InnoDB;' )
FROM information_schema
.tables
WHERE table_schema
= 'DBNAME'
LIMIT 0 , 10000;
修改为MyISAM
SELECT CONCAT( 'ALTER TABLE ', TABLE_NAME, ' ENGINE=MyISAM;' )
FROM information_schema
.tables
WHERE table_schema
= 'DBNAME'
LIMIT 0 , 10000;
使用说明：
将以上SQL语句中的 DBNAME 替换成需要修改的数据库名称。
执行SQL，这个时候还没有修改，只是给了一个查询结果。
将查询结果复制，去掉前后的引号，然后执行。
批量修改mysql数据库字符集
ALTER DATABASE DBNAME DEFAULT CHARACTER SET=‘utf8’;
mysql数据库表字段乱码，连接数据库时设置正确的编码即可
mysql_query(‘set names utf8’);
Mysql修改表、字段、库的字符集
ALTER DATABASE `zcqipa250` DEFAULT CHARACTER SET utf8
COLLATE utf8_general_ci
;
ALTER TABLE `qipa250_articles` ENGINE=INNODB;
ALTER TABLE `qipa250_articles_text` ENGINE=INNODB;
ALTER TABLE `qipa250_authors` ENGINE=INNODB;
ALTER TABLE `qipa250_comments` ENGINE=INNODB;
ALTER TABLE `qipa250_comments_description` ENGINE=INNODB;
ALTER TABLE `popular_searches` ENGINE=INNODB;
ALTER TABLE `un_products_to_wishlists` ENGINE=INNODB;
ALTER TABLE `un_wishlists` ENGINE=INNODB;
ALTER TABLE `qipa250_articles` CONVERT TO CHARACTER SET utf8
COLLATE utf8_general_ci
;
ALTER TABLE `qipa250_articles_text` CONVERT TO CHARACTER SET utf8
COLLATE utf8_general_ci
;
ALTER TABLE `qipa250_authors` CONVERT TO CHARACTER SET utf8
COLLATE utf8_general_ci
;
ALTER TABLE `qipa250_comments` CONVERT TO CHARACTER SET utf8
COLLATE utf8_general_ci
;
ALTER TABLE `qipa250_comments_description` CONVERT TO CHARACTER SET utf8
COLLATE utf8_general_ci
;
ALTER TABLE `popular_searches` CONVERT TO CHARACTER SET utf8
COLLATE utf8_general_ci
;
ALTER TABLE `un_products_to_wishlists` CONVERT TO CHARACTER SET utf8
COLLATE utf8_general_ci
;
ALTER TABLE `un_wishlists` CONVERT TO CHARACTER SET utf8
COLLATE utf8_general_ci
;
