A simple question about Calculation property

Hello friends at www.oracle.com ,
I tried to create a summary column that sums data from another block, but it has failed - Oracle showed the FRM-30377 error, and it was needed to create a non-database item at the block to be summarized.
This situation has raised one question: if you can't summarize data that comes from another block, why can you choose the block to be summarized at "Summarized block" at Calculation property?
Thanks, and best regards,
Franklin Goncalves Jr.

You can summarize data that comes from another block. But the calculated item must be in a block that has its Single Record property set to Yes.
So you can create the calculated item in a control block, set Single Record to Yes for the control block, and use the calculated item to display a sum of data from another block.

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842270 wrote:
Hi Guys,
I have a question about calculation script 'Fix'. Below is the sample for my question:
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