小编Mig*_*idy的帖子

我正在尝试使用CASE语句编写GROUP BY子句,因此我可以根据查询中的参数值有条件地使用GROUP BY.这是我正在使用的查询(显着缩短)并且我一直得到"RVPname在选择列表中无效,因为它不包含在聚合函数或GROUP BY子句中.并且DVPname无效且AEname无效.

SELECT
DVPname, RVPname, AEname, Dealer, Product, Distribution, 

CASE WHEN @LEVEL = 'DVP' THEN DVPname
WHEN @LEVEL = 'RVP' THEN RVPname
WHEN @LEVEL = 'AE' THEN AEname
END AS NAME

..........other code here.....

GROUP BY Product, Distribution,
CASE WHEN @LEVEL = 'RVP' THEN AEname WHEN @LEVEL = 'DVP' THEN RVPname WHEN @LEVEL= 'AE' THEN Dealer END

- 有谁知道如何做我想要完成的事情.当LEVEL ='DVP'时我想要GROUP BY RVPname,当LEVEL ='RVP'时我想要GROUP BY AEname ....有意义吗？