character_set_server = utf8 #设置字符集mysql
重启mysql数据库服务sql
查看当前数据库字符集数据库
show VARIABLES like 'character%';
2、修改数据库字符集
alter database 数据库名 character set utf8;post
ps:修改完数据库字符集，须要重启mysql数据库。spa
3、修改表字符集
ALTER TABLE 表名 DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
生成全部表修改字符集语句：code
SELECT TABLE_NAME,CONCAT('ALTER TABLE ',TABLE_NAME,' DEFAULT CHARACTER SET ',a.DEFAULT_CHARACTER_SET_NAME,' COLLATE ',a.DEFAULT_COLLATION_NAME,';') executeSQL FROM information_schema.SCHEMATA a,information_schema.TABLES b
WHERE a.SCHEMA_NAME=b.TABLE_SCHEMA
AND a.DEFAULT_COLLATION_NAME!=b.TABLE_COLLATION
AND b.TABLE_SCHEMA='数据库名'
4、修改列字符集
ALTER TABLE 表名 CHANGE 列名 列名 VARCHAR( 100 ) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL;
生成全部列修改字符集语句：orm
select b.table_name,b.column_name,b.character_set_name,b.collation_name
,CONCAT('ALTER TABLE ',b.table_name,' MODIFY ',b.column_name,' ',b.DATA_TYPE,'(',b.CHARACTER_MAXIMUM_LENGTH,') ',CASE WHEN b.COLUMN_DEFAULT IS NULL THEN '' ELSE CONCAT('DEFAULT \'',b.COLUMN_DEFAULT,'\'') END,' COMMENT \'',b.COLUMN_COMMENT,'\';') executeSQL
from information_schema.TABLES a,information_schema.COLUMNS b where b.character_set_name IS NOT NULL and a.TABLE_SCHEMA=b.TABLE_SCHEMA AND a.TABLE_NAME=b.TABLE_NAME
AND a.TABLE_COLLATION!=b.COLLATION_NAME
and a.TABLE_SCHEMA='数据库名'