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DECLARE @t TABLE(ColumnA INT, ColumnB VARCHAR(50));

INSERT INTO @t VALUES
(0,           '1/1'),
(1  ,         '1/2'),
(1   ,        '1/3'),
(1   ,        '1/3'),
(1    ,       '1/4'),
(1    ,       '1/4'),
(1    ,       '1/4'),
(0     ,      '1/1');

;WITH cte
AS
(
   SELECT ColumnB, SUM(ColumnA) asum
   FROM @t 
   GROUP BY ColumnB
  
), cteRanked AS
(
   SELECT asum, ColumnB, ROW_NUMBER() OVER(ORDER BY ColumnB) rownum
   FROM cte
)
/*
SELECT (SELECT SUM(asum) FROM cteRanked c2 WHERE c2.rownum <= c1.rownum) AS ColumnA, ColumnB
FROM cteRanked c1;*/
--SELECT * FROM cte;
SELECT * FROM cteRanked;


/*

to this:

ColumnA          ColumnB
3                 a
6(=3+3)           b   
10(=4+3+3)        c   
15(=5+4+3+3)      d 
*/

fork query

edited jan 17 anonymous

created oct 1 12 Mahmoud Gamal