Locate the latest items in the department that are not classified as primary caregivers

Looking for a solution to find records in PHP that are not parent nodes? These records represent the last nodes in the menu tree. The task can only be achieved by using cycles and functions.

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Answer №1

To exclude records based on a related field, you can use a subquery:

SELECT * FROM data_table WHERE item_id NOT IN (SELECT reference_id FROM data_table)

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