✏️ Explanatory Question

How do you select the first record from the newMarkupTrans table, ordered by LineNum in descending order, and filter it based on TransTableId and TransRecId?

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📘 Detailed Answer
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Answer with Explanation

In X++, you can use the select statement along with order by to fetch records based on specific conditions. Here's how you can select the first record from the newMarkupTrans table, ordered by LineNum in descending order, and filter it using TransTableId and TransRecId:

Example Code:


select firstOnly LineNum 
    from newMarkupTrans
    order by newMarkupTrans.LineNum desc
    where newMarkupTrans.TransTableId == _origMarkupTrans.TransTableId
        && newMarkupTrans.TransRecId == _origMarkupTrans.TransRecId;

Explanation:

  1. select firstOnly: Fetches the first matching record.
  2. order by newMarkupTrans.LineNum desc: Orders the results by LineNum in descending order.
  3. where newMarkupTrans.TransTableId == _origMarkupTrans.TransTableId && newMarkupTrans.TransRecId == _origMarkupTrans.TransRecId: Filters the records where the TransTableId and TransRecId match the values from the _origMarkupTrans table.

Key Points:

  • firstOnly: Retrieves only the first record matching the criteria.
  • order by: Sorts the results in a specific order, in this case, descending by LineNum.
← Previous How do you use the LIKE operator in X++ to filter records based on a partial match in a field? Provide an example to select a customer record where the customer’s name contains "ABC".
No next question