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postgresql create table many-to-many

Homely Horse answered on October 7, 2021 Popularity 8/10 Helpfulness 4/10

answer postgresql create table many-to-many

postgresql create table many-to-many

Comment

CREATE TABLE product (
  product_id serial PRIMARY KEY  -- implicit primary key constraint
, product    text NOT NULL
, price      numeric NOT NULL DEFAULT 0
);

CREATE TABLE bill (
  bill_id  serial PRIMARY KEY
, bill     text NOT NULL
, billdate date NOT NULL DEFAULT CURRENT_DATE
);

CREATE TABLE bill_product (
  bill_id    int REFERENCES bill (bill_id) ON UPDATE CASCADE ON DELETE CASCADE
, product_id int REFERENCES product (product_id) ON UPDATE CASCADE
, amount     numeric NOT NULL DEFAULT 1
, CONSTRAINT bill_product_pkey PRIMARY KEY (bill_id, product_id)  -- explicit pk
);

Popularity 8/10 Helpfulness 4/10 Language sql

Source: stackoverflow.com

Tags: create-table many-to-many postgresql sql

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