MySQL Common Issues
Updated 2 July 2026
Database errors often appear as "Error establishing a database connection" or HTTP 500 responses.
This article explains the most common MySQL-related WordPress errors, what usually causes them, and what to check first.
Typical causes
- Wrong database name, user, or password in
wp-config.php. - MySQL service stopped on the server.
- Disk full on the hosting account.
- Corrupted tables after an incomplete backup restore.
Check hosting status pages first, then verify credentials and repair tables via phpMyAdmin if needed.