Common SQL Error Reference

About this tool

Look up common SQL error codes and messages from MySQL and PostgreSQL, with plain explanations. Filter by code or keyword.

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Type a SQL error code, such as 1064 or 23505, into the search box.
2. Or enter a keyword from the message, such as syntax, duplicate, or lock, to narrow the list.
3. Review the matching MySQL or PostgreSQL entries and read the plain explanation beside each one.
4. If you are unsure, compare the error text from your database client with the lookup results to find the closest match.

Step by step, what happens

1. The tool takes the code or keyword you enter and filters its built-in reference list.
2. It matches common MySQL and PostgreSQL error codes and message text so you can find the right entry quickly.
3. For each match, it shows the code, the database type, the message, and a short plain-language explanation.
4. You can refine the search until the result set is small enough to pick the exact error you need.

Worked example

A developer sees a MySQL syntax error while running a query and wants to confirm what the message means.

Input: 1064

1. Enter 1064 in the search field.
2. The tool finds the MySQL entry for the common syntax error.
3. Read the explanation to see that the query has a SQL syntax problem near the part named in the message.

Tips and common mistakes

• Use the exact code if you have it, because numeric codes usually return the fastest and clearest match.
• Try a keyword from the message if the code is missing, such as duplicate, denied, or timeout.
• Check whether the error came from MySQL or PostgreSQL, since similar wording can map to different codes in each database.
• If you only have part of the message, search by the most unusual word instead of a common one like error or failed.

Frequently asked questions