How to Convert Latin1 Characters to UTF-8 in a UTF-8 MySQL Table?

Conversion of Latin1 Characters on a UTF8 Table into UTF8

Your query concerns converting Latin1 characters in a UTF8 table to UTF8. Let's delve into the specifics of the problem and the provided solution to assist you in resolving this issue.

Background

You've discovered the need to set charset correctly between PHP and MySQL for handling UTF-8 data. This has resolved the insertion of new diacritic characters. However, you encounter an issue when attempting to fix the existing rows that contain corrupted characters.

Proposed Solution

The provided solution utilizes the following approach:

1. Convert Binary Values to UTF8:

   convert(cast(convert(name using  latin1) as binary) using utf8)

   This MySQL function recovers the UTF-8 data from the corrupted Latin1 data.

   Optional Adjustment (Depending on Data Alteration):

   You may omit the inner conversion (convert(name using latin1)) if the data was not significantly altered during the initial encoding conversion. In that case, the function would simply be:

   convert(cast(name as binary) using utf8)

By applying this solution, you can successfully convert the Latin1 characters stored in your UTF8 table to the correct UTF8 format, resolving the character corruption issue. Remember to adjust the conversion function based on the nature of the data alteration experienced during the previous encoding process.

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