MS Sql 服务器中的累计总数

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可能的重复:

Possible Duplicate: Calculate a Running Total in SqlServer

I need to get the cumulative (running) total of a column in ms-sql server. I.e. if there is a column named "Marks", then corresponding to each row cumulative sum will the sum of current and previous rows. Can we attain the result without using joins? Because my query is pretty big.

I have included a sample table and data:

CREATE TABLE "SCORE_CHART" ( "STUDENT_NAME" NVARCHAR(20), "MARKS" INT ) INSERT INTO SCORE_CHART (STUDENT_NAME, MARKS) VALUES ('STUD1', 95); INSERT INTO SCORE_CHART (STUDENT_NAME, MARKS) VALUES ('STUD2', 90); INSERT INTO SCORE_CHART (STUDENT_NAME, MARKS) VALUES ('STUD3', 98); SELECT STUDENT_NAME, MARKS FROM SCORE_CHART;

Expected result:

In oracle it’s easy to write like:

SELECT STUDENT_NAME, MARKS, SUM(MARKS) OVER (ORDER BY STUDENT_NAME) CUM_SUM FROM SCORE_CHART ORDER BY STUDENT_NAME;

Thanks in advance.

解决方案

The same query is supported from 2012 onwards. In older versions there are several approaches. Refer this www.sqlperformance/2012/07/t-sql-queries/running-totals