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MySQLで照合順序の確認と変更

Last updated at Posted at 2019-11-26

データベース単位

SELECT @@character_set_database, @@collation_database;
ALTER DATABASE COLLATE 'utf8_general_ci'

テーブル単位

show table status from データベース名;
ALTER TABLE テーブル名 COLLATE 'utf8_general_ci';

カラム単位

use information_schema;
select table_name, column_name, collation_name from columns  where table_schema="データベース名" and collation_name is not null

use データベース名
ALTER TABLE テーブル名 MODIFY COLUMN カラム名 varchar (255) COLLATE 'utf8_general_ci';
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