每月分組最大值

Question

我有一個表格，其值在以下列中：低，中，高和月份。 我想得到以下結果每月的最大值。它會抓住每個月每列的最大值。

這裏是我的發言

SELECT MAX(low) as Low,MAX(medium) as Medium,MAX(high) as High,month as mth FROM tablename WHERE month > 0; 

期望的結果將是

month 1: Low 2 Medium 3 High 4

month 2: Low 4 Medium 2 High 5

month 3: Low 6 Medium 3 High 6

Answer 1

SELECT MAX(low) as Low,MAX(medium) as Medium,MAX(high) as High,month as mth 
FROM tablename 
WHERE month > 0 
GROUP BY month 
ORDER BY month;