用于SUM＆amp;的Microsoft Access查询在查询中排序

Question

SELECT ptMeds.Station, ptMeds.TxDate, ptMeds.PaType, ptMeds.GenMedName, 
ptMeds.Strength, ptMeds.UnitsM, ptMeds.Volume, ptMeds.Dosage
FROM ptMeds
WHERE (((ptMeds.Station)="EMER1") AND ((ptMeds.PaType)="WITHDRAWN")) <I will need to look at the GenMedName field here also>
GROUP BY ptMeds.GenMedName;

我需要能够基于ptMeds.GenMedName进行SUM，然后将结果从最高到最低排序。我通过其他类似问题的回答看了一眼，但找不到我需要做的事情。任何帮助将不胜感激。

Answer 1

SELECT ptMeds.Station, ptMeds.TxDate, ptMeds.PaType, ptMeds.GenMedName, 
ptMeds.Strength, ptMeds.UnitsM, ptMeds.Volume, ptMeds.Dosage
FROM ptMeds
WHERE (((ptMeds.Station)="EMER1") AND ((ptMeds.PaType)="WITHDRAWN")) 
GROUP BY ptMeds.GenMedName
ORDER BY ptMeds.GenMedName DESC;