Hi I am trying to use the SQL Merge statement on databricks

MERGE INTO target

USING source

ON source.key = target.key

WHEN MATCHED

UPDATE SET *

WHEN NOT MATCHED

INSERT *

WHEN NOT MATCHED BY SOURCE

DELETE

This is failing with the error [PARSE_SYNTAX_ERROR] Syntax error at or near 'UPDATE'.(line 18, pos 2). I am running my notebook on a cluster that is running Databricks 12.2

Any help is appreciated.