Question

I have MyTbl like this

Id  type    amount
--  ----    ------
1   1       100
2   1       200
3   2       300
4   2       400

Is it possible to write a query for sqlite in Android that returns this?

Amount1 Amount2
------- -------
300     700

I have written the following query but it is not ok:

select SUM(a.amount) as Amount1, SUM(b.amount) as Amount2 from MyTbl a inner join MyTbl b
on a.id = b.id
group by a.type

it returns:

Amount1 Amount2
------- -------
300     300
700     700

Answer 1

SELECT
    SUM(CASE WHEN type = 1 THEN amount ELSE 0 END) amount1,
    SUM(CASE WHEN type = 2 THEN amount ELSE 0 END) amount2
FROM MyTbl

SQL FIDDLE