MYSQL Multiple Selects, Where and Group By for Same Table - mysql

Question

I have two MYSQL queries that i am trying to merge into one, here is the first one -
SELECT
`Your_Name` as agentname,
sum(`Sale_Amount`) as todaysales,
COUNT(*) as NoSales
FROM mp_wp_sales_tracking
WHERE `created` BETWEEN CURDATE() AND NOW()
GROUP BY agentname
And the second one is the same query, just for the previous day
SELECT
`Your_Name` as agentname,
sum(`Sale_Amount`) as yesterdaysales,
COUNT(*) as YesterdayNoSales
FROM mp_wp_sales_tracking
WHERE `created` BETWEEN DATE_SUB(CURDATE(),INTERVAL 1 DAY)
AND ADDTIME(DATE_SUB(CURDATE(),INTERVAL 1 DAY),'23:59:59.50')
GROUP BY agentname
Now what i am trying to do, is achieve something like below (Headers as per aliases in MYSQL)
| agentname | todaysales | nosales | yesterdaysales | yesterdaynosales |
I have already tried to use Inner Join, but keep getting SQL errors, i am not sure where to turn on this, being quite new to complex MYSQL queries.

Answer 1

I can think of one way to merge these 2 queries and use conditional aggregation for the results
SELECT `Your_Name` as agentname,
SUM( CASE WHEN
`created` BETWEEN DATE_SUB(CURDATE(),INTERVAL 1 DAY) AND ADDTIME(DATE_SUB(CURDATE(),INTERVAL 1 DAY),'23:59:59.50')
THEN `Sale_Amount`
ELSE 0 END
) as yesterdaysales,
SUM(`created` BETWEEN DATE_SUB(CURDATE(),INTERVAL 1 DAY) AND ADDTIME(DATE_SUB(CURDATE(),INTERVAL 1 DAY),'23:59:59.50') ) as YesterdayNoSales ,
SUM(CASE WHEN
`created` BETWEEN CURDATE() AND NOW()
THEN `Sale_Amount`
ELSE 0 END
) as todaysales,
SUM(`created` BETWEEN CURDATE() AND NOW() ) as NoSales
FROM mp_wp_sales_tracking
WHERE `created` BETWEEN DATE_SUB(CURDATE(),INTERVAL 1 DAY) AND ADDTIME(DATE_SUB(CURDATE(),INTERVAL 1 DAY),'23:59:59.50')
OR `created` BETWEEN CURDATE() AND NOW()
GROUP BY agentname

Answer 2

Use conditional aggregation (i.e. boolean expressions inside an aggragtion function such as SUM).
select
your_name as agentname,
sum(case when date(created) = curdate() then sale_amount end) as todaysales,
sum(date(created) = curdate()) as todaynosales,
sum(case when date(created) = curdate() - interval 1 day then sale_amount end)
as yesterdaysales,
sum(date(created) = curdate() - interval 1 day) as yesterdaynosales
from mp_wp_sales_tracking
where created >= curdate() - interval 1 day
group by agentname
order by agentname;