Combine two SQL queries which use Date Intervals, Group and SUM - mysql

Question

First off, thank you in advance.
I have 2 queries that I am working with as I would like to compare last week to the previous week...
Getting Last Week
SELECT keyword,
SUM(users_desktop) AS desktop_last_week
FROM js
WHERE country='US'
AND day >= curdate() - INTERVAL DAYOFWEEK(curdate())+6 DAY
AND day < curdate() - INTERVAL DAYOFWEEK(curdate())-1 DAY
GROUP BY keyword
ORDER BY desktop_last_week DESC
LIMIT 10;
Getting Previous Week
SELECT keyword,
SUM(users_desktop) AS desktop_previous_week
FROM js
WHERE country='US'
AND day >= curdate() - INTERVAL DAYOFWEEK(curdate())+12 DAY
AND day < curdate() - INTERVAL DAYOFWEEK(curdate())-7 DAY
GROUP BY keyword
ORDER BY desktop_previous_week DESC
LIMIT 10;
What I would like to do is combine these queries so that I can then ORDER BY the division of desktop_last_week/desktop_this_week to find keywords that are trending up (ie: searched a lot more this week than last week)
Any idea on how to combine these together?

Answer 1

This is called conditional aggregation. Use where clauses from your existing queries to do it.
SELECT keyword,
Sum(CASE
WHEN day >= Curdate() - INTERVAL Dayofweek(Curdate())+6 day
AND day < Curdate() - INTERVAL Dayofweek(Curdate())-1 day THEN
users_desktop
ELSE 0
end) AS desktop_last_week,
Sum(CASE
WHEN day >= Curdate() - INTERVAL Dayofweek(Curdate())+12 day
AND day < Curdate() - INTERVAL Dayofweek(Curdate())-7 day THEN
users_desktop
ELSE 0
end) AS desktop_prev_last_week
FROM js
WHERE country = 'US'
GROUP BY keyword
ORDER BY desktop_prev_last_week / desktop_this_week DESC
LIMIT 10

Answer 2

Use Union!
You can get 2 Queries to one with that. If you want to order that then put it into a subquery

Answer 3

You could expand the where clause to contain both time ranges and move the logic of differentiating between them to case expressions inside the sums. By the way, using the between operator instead of a >= and < pair would make the query itself a tad easier to read:
SELECT keyword,
SUM(CASE WHEN day BETWEEN
(CURDATE() - INTERVAL DAYOFWEEK(curdate()) + 6 DAY) AND
(CURDATE() - INTERVAL DAYOFWEEK(curdate()) - 1 DAY)
THEN users_desktop
END) AS desktop_last_week,
SUM(CASE WHEN day BETWEEN
(CURDATE() - INTERVAL DAYOFWEEK(curdate()) + 12 DAY) AND
(CURDATE() - INTERVAL DAYOFWEEK(curdate()) - 7 DAY)
THEN users_desktop
END) AS desktop_previous_week
FROM js
WHERE country = 'US'
GROUP BY keyword
ORDER BY desktop_last_week DESC, desktop_previous_week DESC
LIMIT 10;