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character encoding - How to convert an entire MySQL database characterset and collation to UTF-8? - Stack Overflow
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php - Collation issue, Is it possible to downgrade/convert from utf8mb4_unicode_ci to utf8_general_ci? - Stack Overflow
MySQL】ERROR 1253 (42000): COLLATION 'utf8_general_ci' is not valid for CHARACTER SET 'utf8mb4' - memo
![character encoding - How to convert an entire MySQL database characterset and collation to UTF-8? - Stack Overflow character encoding - How to convert an entire MySQL database characterset and collation to UTF-8? - Stack Overflow](https://i.stack.imgur.com/vJTVe.png)
character encoding - How to convert an entire MySQL database characterset and collation to UTF-8? - Stack Overflow
![MySQL Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and ( utf8_general_ci,IMPLICIT) for operation 'Concat' – candokendo MySQL Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and ( utf8_general_ci,IMPLICIT) for operation 'Concat' – candokendo](https://askimran.files.wordpress.com/2016/05/collations.png)
MySQL Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and ( utf8_general_ci,IMPLICIT) for operation 'Concat' – candokendo
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