Error ORA-00904 when trying to update

Question

I am trying to update one table with values from another table. This is how I am trying to do this
UPDATE TOMBSTONE T
SET T._PACKAGE=(SELECT A.PACKAGE from RISK A)
WHERE T.ID=A.ID
When I try to execute this query I get error "ORA-00904 "A"."ID" : invalid identifier"
What do I do wrong?
Thanks
Message was edited by:
user459138

Answer 1

Wrong syntax.
Try
UPDATE TOMBSTONE T
SET T._PACKAGE=(SELECT A.PACKAGE from RISK A WHERE T.ID=A.ID)
WHERE EXISTS (SELECT 1 FROM RISK A WHERE T.ID=A.ID)
Rgds.