SQLite : Need to combine results from one table with another result - sqlite

Question

I have 2 tables :
payments:
id amount type code
1 1200 0 111
2 100 1 111
3 200 0 111
4 50 0 112
5 500 2 112
6 300 3 113
bills:
id details code
-----------------------
1 bill-1 111
2 bill-2 112
3 bill-3 113
4 bill-4 114
I wanted to sum the amounts in payments table and join it with bills like below
result:
bills.code type0Sum type1Sum type2Sum type3Sum
-------------------------------------------------------------------------
111 1400 100 0 0
112 50 0 500 0
113 0 0 0 300
114 0 0 0 0
Sorry if this is a newbie question
[Edit]
I have used a similar query as below :
SELECT *
FROM bills,
(SELECT SUM(amount) AS type0Sum, code
FROM payments
WHERE type = 0
GROUP BY code)
AS sub1,
(SELECT SUM(amount) AS type1Sum, code
FROM payments
WHERE type = 1
GROUP BY ref_code)
AS sub2
WHERE bills.code = sub1.code
AND bills.code = sub2.code
But I am getting only the rows those having the type like :
bills.code type0Sum type1Sum type2Sum type3Sum
-------------------------------------------------------
111 1400 100

Answer 1

I've modified that final query to do proper joins, not the old joins that you were doing (read up on cartesian joins). Give this one a go for you, see if it works;
SELECT b.code
,sub1.type0Sum
,sub2.type1Sum
FROM bills b
LEFT JOIN (
SELECT SUM(amount) AS type0Sum
,code
FROM payments
WHERE type = 0
GROUP BY code
) AS sub1 ON b.code = sub1.code
LEFT JOIN (
SELECT SUM(amount) AS type1Sum
,code
FROM payments
WHERE type = 1
GROUP BY ref_code
) AS sub2 ON b.code = sub2.code
There are other ways of doing this that are more efficient but I've kept to your query in order to help you learn.