Fix Garbled Database Characters: Quick Guide

The issue of garbled data when adding data to a database is usually caused by a mismatch between the character set of the database and the character set of the data. The solution is as follows:

1. Check the character set of the database: You can use the following SQL statement to query the character set of the database:

SHOW VARIABLES LIKE 'character_set_database';
SHOW VARIABLES LIKE 'collation_database';

Make sure that the character set of the database matches that of the data. If they don’t match, you can resolve this by modifying the character set of the database.

1. Check the character set of the data: before inserting the data, you can convert the character set of the data to match the database’s character set, and then insert it into the database. Conversion of character sets can be done using the following functions:

CONVERT(data, target_character_set, source_character_set);

Among them, data is the data to be converted, target_character_set is the target character set, and source_character_set is the character set of the original data.

For example, when inserting UTF-8 encoded data into a database, you can use the following statement for character set conversion:

INSERT INTO table_name (column1, column2, ...) VALUES (CONVERT('data', 'utf8', 'utf8mb4'));

1. Change the character set of the database connection: If the above method doesn’t work, you can try modifying the character set of the database connection. You can add the following statement in the code that connects to the database to set the character set of the connection.

SET NAMES 'charset';

Among them, charset is the character set of the database.

For example, to set the character encoding to UTF-8, you can use the following statement:

SET NAMES 'utf8';

After connecting to the database, all data read and write operations will use the UTF-8 character set, effectively resolving any garbled text issues.

Please note that the above methods are applicable to most cases of garbled text issues, but if the garbled text problem is more complex or specific, a more specific solution may be needed.