正確相關的SQL查詢

Question

Salary Sum 
10  10 
20  30 
10  40 
70  110 

我需要一個查詢這給我的DataTable在上面的格式，在此之列的值是依賴於工資列

Answer 1

如果你在你表的主鍵你可以用這樣的東西：

DECLARE @tbl TABLE(ID INT,Salary INT) 
INSERT INTO @tbl 
VALUES 
    (1,10), 
    (2,20), 
    (3,10), 
    (4,70) 

SELECT 
    tbl.Salary, 
    SUM(tbl2.Salary) AS [Sum] 
FROM 
    @tbl AS tbl 
    JOIN @tbl AS tbl2 
     ON (tbl2.ID <= tbl.ID) 
GROUP BY 
    tbl.ID, 
    tbl.Salary 
ORDER BY 
    tbl.ID, 
    tbl.Salary