Ways to Rename a Database in MySQL 8 (3 Ways)

Introduction

Renaming a database can be essential during a system upgrade, rebranding, or just making database names more descriptive. In MySQL 8, there isn’t a direct RENAME DATABASE command due to the complexity and risk of file-based metadata corruption. However, there are several workarounds to achieve similar outcomes.

Solution 1: Using RENAME TABLE

This approach involves moving tables from the old database to a new one.

1. Create a new database that will hold the renamed tables.
2. Execute the RENAME TABLE command for each table to move them to the new database.
3. Drop the old database if it is no longer needed.

Example:

 CREATE DATABASE new_db_name;
 RENAME TABLE old_db_name.table1 TO new_db_name.table1;
 RENAME TABLE old_db_name.table2 TO new_db_name.table2;
 -- Repeat for each table
 DROP DATABASE old_db_name;
 

Notes: This method requires careful execution to prevent data loss. Ensure to handle foreign keys and other relational constraints appropriately.

Solution 2: Using mysqldump

This method exports the database to a file, which can then be imported into a new database with the desired name.

1. Use mysqldump to export the old database.
2. Create a new database with the intended name.
3. Import the dump file into the new database.
4. Drop the old database if it’s no longer necessary.

 mysqldump -u username -p old_db_name > old_db_name_dump.sql
 CREATE DATABASE new_db_name;
 mysql -u username -p new_db_name < old_db_name_dump.sql DROP DATABASE old_db_name;

Notes: This process can be time-consuming for large databases and ensure you have sufficient space for the dump file.

Solution 3: Use of MySQL Workbench

MySQL Workbench provides a GUI to manage databases, including renaming them through table migrations.

1. Open MySQL Workbench and connect to your server.
2. Navigate to the database you want to rename, and select “Schema Transfer Wizard”.
3. Follow the wizard’s steps to transfer all tables to the new database.
4. Clean up by dropping the old database if needed.

There is no specific SQL code for this operation as it is done through the Workbench interface.

Notes: While this method is more user-friendly, it might not be suitable for command-line orientated workflows or automation scripts. Workbench must also be installed on your system.

Conclusion

Even though direct database renaming is not supported in MySQL 8, these workarounds provide solid alternatives. When renaming a database, always back up your data to prevent any unintentional loss. The method you choose will depend on the size of your database, your working environment, and personal preference.