Error
Error Code:
1247
MariaDB Error 1247: Invalid Column Reference
Description
This error indicates that a column or alias referenced in your SQL query is either not recognized, out of scope, or used in an unsupported context. It commonly occurs when using aliases incorrectly in `GROUP BY`, `ORDER BY`, or `HAVING` clauses, or when attempting to reference non-existent or out-of-scope columns.
Error Message
Reference '%s' not supported (%s)
Known Causes
3 known causesAlias in GROUP BY/HAVING
Referencing a column alias, defined in the SELECT list, directly within a GROUP BY or HAVING clause is generally not supported by standard SQL and MariaDB.
Out-of-Scope Column Reference
A column is referenced that is not available in the current query block or subquery's scope, leading to an unrecognized reference.
Typo in Column/Alias Name
The specified column name or alias does not exist or is misspelled in the query, causing MariaDB to report it as unsupported.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service