在mysql中对列进行计算

Question

我需要根据这个进行计算：

（col1 + col2 + col3 + col4 + col5）/ col6

当这个计算完成后，我想根据获得的结果执行一个orderby。

请建议。我知道如何执行这样的总和：

SELECT SUM(column1) + SUM(column2) + SUM(columnN) FROM mytable 

Answer 1

SELECT (column1+column2+columnN)/column6
FROM mytable
ORDER BY (column1+column2+columnN)/column6

Answer 2

我认为你的意思是：

SELECT ((column1 + column2 + columnN) / column6) as calc 
FROM mytable order by calc

Answer 3

SELECT (col1 + col2 + col3 + col4 + col5) /col6 as calculated
FROM your_table
ORDER BY calculated

Answer 4

试试这个::

SELECT (column1+column2+columnN) as total,
total/column6 as average
FROM mytable
ORDER BY total