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Create Table temp([Days Since Install] INT, Installs INT) INSERT INTO temp VALUES(1,1) INSERT INTO temp VALUES(2,2) INSERT INTO temp VALUES(3,3) INSERT INTO temp VALUES(4,4)
4 rows affected
WITH RankedTable AS ( SELECT [Days Since Install], Installs, ROW_NUMBER() OVER (ORDER BY [Days Since Install]) AS RowNum FROM temp ) SELECT rt.[Days Since Install], SUM(rt2.Installs) AS Installs FROM RankedTable rt JOIN RankedTable rt2 ON rt2.RowNum >= rt.RowNum GROUP BY rt.[Days Since Install] ORDER BY rt.[Days Since Install];
Days Since Install
Installs
1
10
2
9
3
7
4
4