計算的列在MySQL

Question

我需要執行在此基礎上計算：

（COL1 + COL2 + COL3 + COL4 + COL5）/ COL6

而當這個計算已經做了，我想根據獲得的結果執行一次訂單。

請建議。我知道如何執行這樣的總和：

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

我想你的意思是這樣的：

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

Answer 3

試試這個::

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

Answer 4

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