在Postgresql中将重复项分组在一起

我正在进行查询，以查看有多少库存被记入我们的仓库，如何将所有副本组合在一起，以便所有数量可以作为一个，而同一产品不会多次显示？我将发布一个屏幕截图来显示我得到了什么和我正在使用的代码。 谢谢

sum和group by（以及适用于任何非group by表达式的适当函数）。e、 g

---

您是否尝试将

分组依据

与

总和

一起使用？

select b.qty, a.part, a.desc1, a.main_supplier as supplier_acc_no, c.name as 
 supplier_name, a.main_mpn, a.date_receipt as date_booked_in
from public.stock as a
inner JOIN public.sthist AS b ON a.part = b.part
inner join public.supplier as c on a.main_supplier = c.account
where a.date_receipt > date_trunc('day', CURRENT_DATE) - INTERVAL '2 days'
and b.tran_type = 'POGRN'

select sum(b.qty), a.part, min(a.desc1), 
min(a.main_supplier) as supplier_acc_no, min(c.name) as supplier_name, 
min(a.main_mpn), min(a.date_receipt) as date_booked_in
from public.stock as a
inner JOIN public.sthist AS b ON a.part = b.part
inner join public.supplier as c on a.main_supplier = c.account
where a.date_receipt > date_trunc('day', CURRENT_DATE) - INTERVAL '2 days'
and b.tran_type = 'POGRN'
group by a.part