使用帶匯總字段的Order by和Group By函數對SQL查詢結果進行排序時遇到麻煩

Question

我的以下查詢結果遇到了一些問題。

我的意圖是顯示主機收到的總付款的結果，並根據匯總列以降序排列（別名為“已收到的總金額（$）”）

Select   H.host_name AS 'Host Name', 
         H.location AS 'District', 
         AVG(F.host_feedback_rating) AS 'Average Rating',
         SUM(P.payment_amount) AS 'Total Amount Received ($)'

FROM booking B, host H, payments P, feedback F 
WHERE H.host_id = P.host_id
AND F.booking_code = B.booking_code
AND F.host_id = H.host_id
AND P.payment_date  between '2018/01/01' and '2018/12/31'

GROUP BY 1,2
ORDER BY 'Total Amount Received ($)' DESC;

當前結果：

Host Name   District    Average Rating  Total Amount Received ($)
John         Detroit              5                275
Leeroy       Chicago              5                50
Rinoa        Texas                5                225
Sally        California           4                45

我試過調整GROUP BY子句，但是總收款（$）不能正確排序...您能對此進行指導嗎？

非常感謝你！

Answer 1

'Total Amount Received ($)'用單引號（ ' ）括起來，因此是常量字符串文字。 雖然按照其排序在技術上沒有錯（如您所見-您沒有錯誤），但它毫無意義，因為所有行的常量值都相同。

最簡單的方法，恕我直言，將根據列的索引而不是其別名進行排序：

ORDER BY 4 DESC

Answer 2

嘗試像這樣的反引號

...ORDER BY `Total Amount Received ($)` DESC

要么

...Order By 4 DESC

要么

...SUM(P.payment_amount) DESC

謝謝 ：）