问题描述
假设这个模式:
create table master (
master_id serial primary key,
project_id int,
category_id int,
supplier_id int
);
create table detail (
detail_id int,
item_id int,
qty numeric(18,2),
rate numeric(18,2),
master_id int references master (master_id)
);
create temporary table temp_detail (
purchase_order_detail_id integer,
item_id integer,
qty numeric(18,2),
project_id integer,
category_id integer,
supplier_id integer,
rate numeric(18,2)
);
可以做到这一点:
with d as (
insert into master (project_id, category_id, supplier_id)
select distinct project_id, category_id, supplier_id
from temp_detail
returning *
)
insert into detail (item_id, qty, rate, master_id)
select item_id, qty, rate, master_id
from
temp_detail td
inner join
d on (td.project_id, td.category_id, td.supplier_id) = (d.project_id, d.category_id, d.supplier_id)
;
解决方法
我有下表。
CREATE TEMPORARY TABLE temp_detail
(
purchase_order_detail_id INTEGER,item_id integer,qty numeric(18,2),project_id integer,category_id integer,supplier_id integer,rate numeric(18,2)
);
我正在使用ID获取分组结果
SELECT array_agg(purchase_order_detail_id),project_id,category_id,supplier_id
FROM temp_detail
GROUP BY project_id,supplier_id
现在,我想将project_id,category_id,supplier_id插入主表,并将item_id,qty,rate插入其明细表。明细表会将主表ID作为外键。请帮忙。