您将如何从表中变换列:
ColumnA ColumnB 2 a 3 b 4 c 5 d 1 a
到这个:
ColumnA ColumnB 3 a 6(=3+3) b 10(=4+3+3) c 15(=5+4+3+3) d
解决方法
喜欢这个:
;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),ColumnB FROM cteranked c1;
这应该给你:
ColumnA ColumnB 3 a 6 b 10 c 15 d