How do I combine 2 queries from difference tables - mysql

Question

I have 2 queries. The 1st is to find the netamount and the 2nd is the sum of budget. i need to show the result including the store name and storenumber which are from difference table.
Here is my 1st Query to find total netamount:
SELECT sum(a.netamt) as netamt, b.store_name
FROM site_sales a JOIN site_store b ON b.storenum = a.storenum
WHERE a.busidate >= '2017-01-01' AND a.busidate <='2017-04-30'
GROUP BY a.storenum
The 2nd Query is to find total budget
SELECT
SUM(CASE WHEN c.busidate BETWEEN '2017-01' AND '2017-04' THEN c.budget ELSE 0 END) as budget,
b.store_name
FROM site_kpimthslsbgt c JOIN site_store b ON b.storenum = c.storenum
GROUP BY c.storenum
I need to combine both of this query. The result of output should be
like this

Answer 1

try this Also you need to put up join conditions in the end if there are multiple records fetched in your individual queries :
Select x.netamt, y.budget, y.store_name
from
(
SELECT sum(a.netamt) as netamt, b.store_name
FROM site_sales a JOIN site_store b ON b.storenum = a.storenum
WHERE a.busidate >= '2017-01-01' AND a.busidate <='2017-04-30'
GROUP BY a.storenum
) x
inner join
(
SELECT
SUM(CASE WHEN c.busidate BETWEEN '2017-01' AND '2017-04' THEN c.budget ELSE 0 END) as budget,
b.store_name
FROM site_kpimthslsbgt c JOIN site_store b ON b.storenum = c.storenum
GROUP BY c.storenum
) y
on x.store_name = y.store_name

Answer 2

SELECT sum(a.netamt) as netamt,SUM(CASE WHEN c.busidate BETWEEN '2017-01' AND '2017-04' THEN c.budget ELSE 0 END) as budget,b.store_name
FROM site_store b
JOIN site_kpimthslsbgt c ON b.storenum = c.storenum
JOIN site_sales a ON b.storenum = a.storenum
GROUP BY b.storenum
Try above query.
Hope this will help you.

Answer 3

I think there are 4 possible scenarios here, stores which have sales and budget, stores which have sales but no budget, stores which have budget but no sales, stores which have neither sales nor budget.
Given
DROP TABLE IF EXISTS site_sales,site_budget;
CREATE TABLE site_sales(ID INT auto_increment primary key, site_id int, busidate date,amt int);
create table site_budget(ID INT auto_increment primary key, site_id int, busidate date,amt int);
insert into site_sales (site_id,busidate,amt) values
(1,'2017-04-01',10),(1,'2017-04-01',20),
(2,'2017-04-01',10);
insert into site_budget (site_id,busidate,amt) values
(1,'2017-04-01',200),
(3,'2017-04-01',100);
This query
SELECT b.name,
sum(case when a.busidate between '2017-01-01' and '2017-04-30' then a.amt else 0 end) as netamt,
ifnull((select SUM(CASE WHEN c.busidate BETWEEN '2017-01-01' AND '2017-04-30' THEN c.amt ELSE 0 END) from site_budget c where b.id = c.site_id ),0) as budget
FROM sites b
left JOIN site_sales a ON b.id = a.site_id
GROUP BY b.id
result
+--------+--------+--------+
| name | netamt | budget |
+--------+--------+--------+
| Store1 | 30 | 200 |
| Store2 | 10 | 0 |
| Store3 | 0 | 100 |
| Store4 | 0 | 0 |
+--------+--------+--------+
4 rows in set (0.00 sec)