将结果分组到两个表中 [英] Grouped result insert into two tables
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问题描述
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
SELECT array_agg(purchase_order_detail_id), project_id, category_id, supplier_id
FROM temp_detail
GROUP BY project_id, category_id, supplier_id
现在,我想将project_id,category_id,supplier_id插入主表中,并将item_id,qty,rate插入其明细表中。明细表会将主表ID作为外键。请帮忙。
Now I want to insert project_id, category_id, supplier_id into a master table and item_id,qty,rate into its detail table. Detail table will have the master table id as foreign key. Please help.
推荐答案
假定此模式:
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)
);
这样做:
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)
;
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