How to change a MySQL database’s table prefix

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How to change a MySQL database’s table prefix

2020.02.18 12:07 조회 수

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Changing a database table prefix is easy and here’s the simple step-by-step guide! For WordPress installations, it’s essential!

What you’ll need

Use random.org to generate a strong table prefix
Access to the database via cPanel or PHPMyAdmin
A text editor
2 minutes

How to change a prefix

In your text editor, change database_name, old_prefix_ and new_prefix_ to the required values:

SET @database   = "database_name";
SET @old_prefix = "old_prefix_";
SET @new_prefix = "new_prefix_";
 
SELECT
    concat(
        "RENAME TABLE ",
        TABLE_NAME,
        " TO ",
        replace(TABLE_NAME, @old_prefix, @new_prefix),
        ';'
    ) AS "SQL"
FROM information_schema.TABLES WHERE TABLE_SCHEMA = @database;

Run the query in cPanel or PHPMyAdmin on your WordPress database
The output will be a series of SQL queries that will rename the tables for you
Run the output
Done!

How to add a prefix

If your database doesn’t have a prefix at all, follow the steps above but use the below query that’s been slightly modified for this purpose:

SET @database = "database_name";
SET @prefix   = "prefix_";
 
SELECT
    concat(
        "RENAME TABLE ",
        TABLE_NAME,
        " TO ",
        @prefix,
        TABLE_NAME,
        ';'
    ) AS "SQL"
FROM information_schema.TABLES WHERE TABLE_SCHEMA = @database;

Conclusion

See how easy that was? Isn’t it great when articles just get straight to the point? :)

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