sql - Performing an aggregate operation (SUM) with the results of another query -


i have 2 tables: 

bookings (uid integer, in_date date, paxname text, acnumber integer)

and 

accounts (uid integer, uidbooking integer, acnumber integer, amount_charged double)

i sum charges accounts table belong subset of bookings.

the first select chooses bookings in perdiod of time...

select bookings.uid, bookings.acnumber bookings.status = 'checkedin'  , bookings.indate > '2017-07-01'

now second select should charges of bookings , sum amounts of accounts belonging selected bookings... 

select sum(amount_charged) accounts acnumber = bookings.acnumber

so, how can results bookings uid, account number , in same row, sum of account charges... ?

thnks

using join plus group syntax or query follows:

select b.uid, b.acnumber,sum(a.amount_charged)  bookings b, accounts  b.acnumber = a.acnumber  , b.status = 'checkedin'  , b.indate > '2017-07-01' group b.uid,b.acnumber;

in table bookings there no acnumber, maybe have exchange b.acnumber b.account.


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