PHPWarningDatabase ErrorMay 2, 2026

Database Error

SQLSTATE[HY000][1049] Unknown database 'my_database' (SQL: select * from users where email = 'user@example.com')

What This Error Means

This error occurs when the database connection fails due to an unknown or non-existent database. This can happen when the database name is misspelled or the database does not exist on the server.

Why It Happens

This error typically occurs when the database connection settings are incorrect, or when the database name is misspelled in the connection string. It can also happen if the database does not exist on the server, which can be due to a typo, renaming the database, or deleting it.

How to Fix It

  1. 1To fix this error, you need to ensure that the database name is correct and exists on the server. Here are the steps:
  2. 21. Check the database name in the connection string. Make sure it matches the actual database name on the server.
  3. 32. If the database does not exist, create it using a tool like phpMyAdmin or the command line.
  4. 43. Update the database connection settings with the correct database name.
  5. 54. Test the connection again by running the query to ensure it works.

Example Code Solution

❌ Before (problematic code)
PHP
$dsn = 'mysql:host=localhost;dbname=my_database';
✅ After (fixed code)
PHP
$dsn = 'mysql:host=localhost;dbname=correct_database_name';

Fix for SQLSTATE[HY000][1049] Unknown database 'my_database' (SQL: select * from users where email = 'user@example.com')

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