What is UTF-8 collation in MySQL?

If you’re using MySQL 5.7, the default MySQL collation is generally latin1_swedish_ci because MySQL uses latin1 as its default character set. If you’re using MySQL 8.0, the default charset is utf8mb4. If you elect to use UTF-8 as your collation, always use utf8mb4 (specifically utf8mb4_unicode_ci).

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What is the difference between utf8mb4 and utf8 charsets in MySQL?

The difference between utf8 and utf8mb4 is that the former can only store 3 byte characters, while the latter can store 4 byte characters. In Unicode terms, utf8 can only store characters in the Basic Multilingual Plane, while utf8mb4 can store any Unicode character.

What is a MySQL dump file?

4 mysqldump — A Database Backup Program. The mysqldump client utility performs logical backups, producing a set of SQL statements that can be executed to reproduce the original database object definitions and table data. It dumps one or more MySQL databases for backup or transfer to another SQL server.

Where is the MySQL dump file?

The mysqldump tool is located in the root/bin directory of the MySQL installation directory.

What should be the collation in MySQL?

Short answer: always use utf8mb4 (specifically utf8mb4_unicode_ci ) when dealing with collation in MySql & MariaDB.

Which is better UTF-8 or utf8mb4?

What is the difference between utf8 and utf8mb4?

Is it possible to fix UTF-8 in MySQL?

If I’m right, it means that you can have all your columns, connections and tables set to UTF-8, but your data is simply bad. You really just need the opposite operation. For example, if you had a PHP string $data, which is ‘double-encoded’ as UTF-8, the process would simply be to call this: It’s also possible to fix this in MySQL.

What is the difference between Unicode and UTF-8?

The letter A is a symbol, the number 0 is the encoding for A, and the combination of all four letters and their encodings is a character set. UTF-8 (Unicode Transformation Format with 8-bit units) is an alternative way to store Unicode data.

How to dump a MySQL database safely?

mysqldump -uroot -p database > utf8.dump This is the correct way to dump a MySQL database safely: $ mysqldump -uroot -p database -r utf8.dump… The -r or, the same, –result-file option, will create the output in ASCII format.

Why do I get mojibake with utf8mb4?

utf8mb4 is a superset (and superior to) utf8. It’s better to have your server default to utf8mb4. The popular usecase of utf8mb4 is emoji. Anyway, the reason you are getting mojibake is probably unrelated to having these character sets set correctly.

https://www.youtube.com/watch?v=cl-E_UtM8S8