Question

I get the SQL error ORA-00933 for the statement below. This parses in postgres, but not in oracle… How should this be formatted for oracle?

Thanks in advance!

UPDATE comments 
SET parent_type='report' 
FROM reports 
WHERE comments.parent_id=reports.id;

Answer 1

Try this for Oracle:

UPDATE Comments
SET parent_type = 'report'
WHERE parent_id IN (SELECT Id FROM Reports)

Or if you’re trying to set the value equal to a value in another column:

UPDATE Comments
SET parent_type = (SELECT FieldName
                   FROM reports
                   WHERE reports.id = Comments.parent_id);

This would work with MSSQL:

UPDATE c
SET c.parent_type='report' 
FROM Comments c JOIN reports r ON c.parent_id=r.id

Good luck.