<ul><li>A certain database table describes the payment cycle for multiple projects.</li><li>The task is to identify each payment month for each project and calculate the total amount for that payment cycle.</li><li>SQL does not have a direct ordered grouping, it requires the use of window functions and subqueries.</li><li>SPL (Structured Query Language Processing Language) supports convenient ordered calculations and offers straightforward code.</li></ul>

Do Ordered Grouping and Aggregation within Groups — From SQL to SPL #1

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