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Sorry, but all my tries fail.
Should I use column aliases or column headings?
Error Error processing validation. ORA-06550: line 1, column 29: PLS-00201: identifier '_COLUMN_ALIAS_' must be declared ORA-06550: line 1, column 7: PL/SQL: Statement ignored
Can you give me a step by step example?
I know this is an old post, but I'm trying to do the same thing and can't get it to work using :COLUMN1 <= :COLUMN2. I should definitely be using Tabular Form Row, PL/SQL expression, and using the database field names not the column headers, correct? Any other suggestions?
I'm using Apex 4.2 by the way.
Thanks for your help.