'error: column "column_name" does not exist' - what to do?

You're trying to reference a column that doesn't exist in the table or has a different name.


ERROR:  column "user_name" does not exist


1. Double-check the column name for typos.
2. Make sure you reference the column in the correct table.
3. Ensure the column exists in the desired table.

Beginner's Guide to SQL