Mehrere Auswahlabfrage postgresql mit

Question

Ich habe 2 Tabellen

TABLE_A

id b_ref_id qty 
52 9   13 
53 10   20 
54 11   25 

Table_B

id method  date    state 
9 m1   28/07/16    confirmed 
10 m1   29/07/16    done 
11 m1   30/07/16    waiting 

Mein Wunsch Ausgang

m1   today tomorrow day_after_tomorrow 
waiting  13  0     0 
confirmed 0  20    0 
done  0  0     25 

ich folgende Abfrage versuchen, aber Menge ist Wiederholen Sie für alle

select stock_p.method, stock_p.state, 
(select sm.qty 
from 
    table_a sm 
    join table_b spo on (sm.b_ref_id=spo.id) 
where 
    to_char(spo.date,'YYYY-MM-DD')::date = current_date and) today_qty, 
(select sm.qty 
from table_a sm 
    join table_b spo on (sm.b_ref_id=spo.id) 
where 
    to_char(spo.date,'YYYY-MM-DD')::date = (current_date + 1)) tomorrow_qty, 
(select sm.qty 
from table_a sm 
    join table_b spo on (sm.b_ref_id=spo.id) 
    where 
    to_char(spo.date,'YYYY-MM-DD')::date = (current_date + 2)) next_three_qty 

von TABLE_A stock_m beitreten Table_B stock_p auf stock_m.b_ref_id = stock_p.id Gruppe von stock_p.method, stock_p.stateenter Code hier

Answer 1

select 
    t1.method, t1.status, 
    sum ((t1.min_date = current_date or null)::int * sm.product_qty) as today, 
    sum ((t1.min_date = current_date + 1 or null)::int * sm.product_qty) as tomorrow, 
    sum ((t1.min_date = current_date + 2 or null)::int * sm.product_qty) as day_after_tomorrow 
from 
    stock_move sm 
    inner join 
    table_1icking t1 on sm.picking_id = t1.id 
group by t1.method, t1.status 
; 
method | status | today | tomorrow | day_after_tomorrow 
--------+-----------+-------+----------+-------------------- 
m1  | waiting |  |   |     25 
m1  | done  |  |  20 |     
m1  | confirmed | 13 |   |     

Mit 9.4+ Verwendung filter wie kommentiert von @ein Pferd. Die Daten:

create table stock_move (id int, picking_id int, product_qty int); 
insert into stock_move (id, picking_id, product_qty) values 
(52,9,13), (53,10,20), (54,11,25); 
set datestyle = 'dmy'; 
create table table_1icking (id int, method text, min_date date, status text); 
insert into table_1icking (id, method, min_date, status) values 
(9,'m1','28/07/16','confirmed'), 
(10,'m1','29/07/16','done'), 
(11,'m1','30/07/16','waiting');