Question

In my Database,

There is Data like this,

 ID  average_time
 1    5
 2    10
 3    15
 4    20
 5    25 
 6    30

I create a query;

 select total(average_time) from tbl_Timer order by id desc limit 5

It”s give the total of all values.

I want Total of LastFive Data,

How can i Do that?

Answer 1

Try this:

select  sum(avtime) from
  (SELECT average_time AS avTime 
   FROM tbl_Timer
   ORDER BY id DESC LIMIT 5)