android - SUM query in multiple table with group by sqlite database -

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hello friends have 3 tables property_master , rent_master,expense_master , fields below

property_master --> p_id, p_name

rent_master --> r_id,p_id,r_amount

expense_master --> e_id,p_id,e_amount

i want total sum of r_amount, , e_amount single query query below 

   select p.p_id "product code",    p.p_name "description",     sum(case when ri.r_amount null 0 else ri.r_amount end) "quantity" ,    sum(case when d.e_amount null 0 else d.e_amount end) "dquantity"     property_master p    left join rent_master ri on ri.p_id = p.p_id    left  join expense_master d on d.p_id = p.p_id    group p.p_id    order sum(ri.r_amount) desc,    sum(d.e_amount) desc

when run above code give right value r_amount e_amount give double value idea how can solve this?

when there 2 different rent_master rows same p_id values, 2 joined rows each matching expense_master row.

you have compute sums independent subqueries:

select p_id "product code",        p_name "description",        (select sum(r_amount)         rent_master         p_id = property_master.p_id        ) "quantity",        (select sum(e_amount)         expense_master         p_id = property_master.p_id        ) "dquantity" property_master order quantity desc,          dquantity desc

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