SQL Invalid Column Name
The query references a field the database cannot resolve.
LIKELY CAUSE
Why it happens
Check spelling, aliases, schema/table selection and execution order.
SAFE FIX
What to do
Select a few rows from the source table and verify the actual column names.
Debug in this order
- Reproduce the problem on the smallest sample that still fails.
- Inspect the exact keys, types, ranges or markup involved instead of only the displayed value.
- Fix the root cause, then rerun the original case and one known-good case.
- Document the rule if the same problem can return in recurring work.
Do not hide an unexplained data error with a cosmetic workaround. Make the input and matching logic predictable first.