Question

i have a table stores activity
a want to generate a overview selecting sum(total) based on the date (unixtime)

like Select SUM(total) from list where date between 123456789 and 2000000
somethings like this ..

but i would like to get more date ranges out with one query

to have a listable result like

• sum(total) of 2 days ago
• sum(total) of yesterday
• sum(total) of today

and so on …

Answer 1

You don’t need a UNION. Something like this should work:

select SUM(total) as Total,
    SUM(
        case when date >= DATE_SUB(CONCAT(CURDATE(), ' 00:00:00'), INTERVAL 2 DAY) 
            and date < DATE_SUB(CONCAT(CURDATE(), ' 00:00:00'), INTERVAL 1 DAY) then total end
    ) TwoDaysAgoTotal,
    SUM(
        case when date >= DATE_SUB(CONCAT(CURDATE(), ' 00:00:00'), INTERVAL 1 DAY) 
            and date < CONCAT(CURDATE(), ' 00:00:00') then total end
    ) as OneDayAgoTotal,
    SUM(
        case when date >= CONCAT(CURDATE(), ' 00:00:00') then total end
    ) as TodayTotal
from list
where date between 123456789 and 2000000