Question

似乎无法让我的专栏以降序显示。

SELECT ROUND(COUNT(*) * 100.0 / (SELECT COUNT(*) FROM Employee),2)||" %" AS "% of Employee", R.Region AS Region
FROM Employee R
GROUP BY R.Region
ORDER DESC "% of Employee" DESC

它在DESC中打印出Region的顺序，而不是员工的百分比

% of Employee | Region
----------------------- 
3.08%         | Darwin
20.64%        | Copley
2.44%         | Brisbane
2.44%         | Albany

Answer 1

DESC位于ORDER BY：

的末尾

SELECT ROUND(COUNT(*) * 100.0 / (SELECT COUNT(*) FROM Employee),2)||" %" AS "% of Employee",
       R.Region AS Region
FROM Employee R
GROUP BY R.Region
ORDER BY "% of Employee" DESC

Answer 2

那是因为您在VARCHAR上订购了。以降序显示的Regions只是一个巧合。您需要仅通过COUNT(*)订购：

SELECT 
    ROUND(COUNT(*) * 100.0 / (SELECT COUNT(*) FROM Employee),2)||" %" AS "% of Employee", R.Region 
    AS Region
FROM Employee R
GROUP BY R.Region
ORDER BY COUNT(*) DESC

在sql中降序

2 个答案: