| ERROR | column used in NATURAL join cannot have qualifier |
| CAUSE | Columns that are used for a named-join (either a NATURAL join or a join with a USING clause) cannot have an explicit qualifier. |
| ACTION | Remove the qualifier. |
| ERROR | column used in NATURAL join cannot have qualifier |
| CAUSE | Columns that are used for a named-join (either a NATURAL join or a join with a USING clause) cannot have an explicit qualifier. |
| ACTION | Remove the qualifier. |