<ul><li>In a SQL Server database, an invoice table and a project table are associated through the ProjectID.</li><li>To divide the amount according to the number of accounts in each project, a SplitAmount field is added to the SQL query.</li><li>In SQL, nested subqueries and window functions are used to calculate the SplitAmount and AdjustedSplitAmount.</li><li>Alternatively, SPL (Stream Processing Language) provides a more natural and simpler approach for the task.</li></ul>

Complement a certain average value to ensure that the total sum remains unchanged:SQL VS SPL

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