T-SQL: Approaches for Running totals, rolling window calculations

https://www.sqlshack.com/running-running-totals-sql-server/

https://sqlperformance.com/2012/07/t-sql-queries/running-totals
https://www.simple-talk.com/sql/t-sql-programming/calculating-values-within-a-rolling-window-in-transact-sql/
http://tomaslind.net/2013/10/22/moving-average-in-t-sql/

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