原文链接:http://fatkun.com/2011/05/mysql-alter-charset.html
MySQL中默认字符集的设置有四级:服务器级,数据库级,表级 。最终是字段级 的字符集设置。注意前三种均为默认设置,并不代码你的字段最终会使用这个字符集设置。所以我们建议要用show create table table ; 或show full fields from tableName; 来检查当前表中字段的字符集设置。
修改数据库字符集:
ALTER DATABASE db_name DEFAULT CHARACTER SET character_name [COLLATE ...];
把表默认的字符集和所有字符列(CHAR,VARCHAR,TEXT)改为新的字符集:
ALTER TABLE tbl_name CONVERT TO CHARACTER SET character_name [COLLATE ...] 如:ALTER TABLE logtest CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;
只是修改表的默认字符集:
ALTER TABLE tbl_name DEFAULT CHARACTER SET character_name [COLLATE...]; 如:ALTER TABLE logtest DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
修改字段的字符集:
ALTER TABLE tbl_name CHANGE c_name c_name CHARACTER SET character_name [COLLATE ...]; 如:ALTER TABLE logtest CHANGE title title VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci;
查看数据库编码:
SHOW CREATE DATABASE db_name
查看表编码:
SHOW CREATE TABLE tbl_name;
查看字段编码:
SHOW FULL COLUMNS FROM tbl_name;