MySQL 1058: Column ignored in ORDER BY.

What is MySQL 1058: Column ignored in ORDER BY.

When encountering error 1058: "Column ignored in ORDER BY" in MySQL, perform the following actions:

Identify the Query Causing the Error:

- Review the application log or MySQL error log (if enabled) to find the exact query causing this error.

Check the Query Syntax:

- Ensure the column referenced in the ORDER BY clause exists in the SELECT statement or in the table schema if it's a plain query. MySQL might ignore columns in ORDER BY under certain conditions, especially if ONLYFULLGROUP_BY SQL mode is enabled and the column is not in the SELECT list.

Disable ONLYFULLGROUP_BY SQL Mode (Temporarily):

- Run the following query to see if ONLYFULLGROUP_BY is enabled:SELECT @@sql_mode; - Temporarily remove ONLYFULLGROUP_BY for the current session to test if it resolves the issue (not recommended for production without understanding the implications):SET SESSION sqlmode = REPLACE(@@sqlmode, 'ONLYFULLGROUP_BY', ''); - Note: This is just for testing. Understand the implications before making permanent changes.

Adjust the Query:

- If ONLYFULLGROUP_BY is causing the issue and you can't or don't want to disable it, adjust your query. Make sure all columns in the ORDER BY clause are also in the SELECT list, or are functionally dependent on columns in the SELECT list.

Investigate Table Schema:

- Ensure the column you're trying to order by exists and that you've spelled it correctly:DESCRIBE yourtablename;

Re-run the Query:

- After making adjustments based on the above steps, re-run your query to see if the issue is resolved.

Check for Indexes (Optional):

- If performance is a concern with the new query, check if appropriate indexes exist to support the ORDER BY operation:SHOW INDEXES FROM yourtablename;Perform these steps to diagnose and potentially resolve the "Column ignored in ORDER BY" error in MySQL.