<ul><li>The task is to find the record closest to ConfirmationStarted among all the Closed records before ConfirmationStarted in each ID.</li><li>In SQL, this problem can be solved using multi-level subqueries and window functions to generate sequence numbers and filter records.</li><li>In SPL (Structured Process Language), which provides natural sequence numbers and rich position-related calculations, this problem can be solved more efficiently.</li><li>esProc SPL is now available as a free download.</li></ul>

Search for the Closest Matching Record within the Group — From SQL to SPL #9

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