| 1 | CREATE TABLE IF NOT EXISTS products ( |
| 2 | product serial PRIMARY KEY, |
| 3 | title TEXT NOT NULL, |
| 4 | subtitle TEXT NOT NULL, |
| 5 | summary TEXT NOT NULL, |
| 6 | pictures TEXT[] NULL, |
| 7 | price INT NOT NULL, |
| 8 | stock INT NOT NULL, |
| 9 | CONSTRAINT positive_stock CHECK (stock >= 0) |
| 10 | ); |
| 11 | |
| 12 | CREATE TABLE IF NOT EXISTS discounts ( |
| 13 | discount VARCHAR(20) PRIMARY KEY, |
| 14 | fraction DECIMAL, |
| 15 | flat INT, |
| 16 | CONSTRAINT fraction_xor_flat CHECK ((fraction IS NULL AND flat IS NOT NULL) OR (fraction IS NOT NULL AND flat IS NULL)) |
| 17 | ); |
| 18 | |
| 19 | CREATE TABLE IF NOT EXISTS orders ( |
| 20 | id TEXT PRIMARY KEY, |
| 21 | products JSON NOT NULL, |
| 22 | total INT NOT NULL, |
| 23 | discount VARCHAR(20) REFERENCES discounts UNIQUE, |
| 24 | |
| 25 | -- DELIVERY |
| 26 | first_name VARCHAR(20) NOT NULL, |
| 27 | last_name VARCHAR(20) NOT NULL, |
| 28 | email VARCHAR(80) NOT NULL, |
| 29 | phone VARCHAR(20), |
| 30 | postcode VARCHAR(10) NOT NULL, |
| 31 | address1 VARCHAR(32) NOT NULL, |
| 32 | address2 VARCHAR(32), |
| 33 | address3 VARCHAR(32), |
| 34 | address4 VARCHAR(32), |
| 35 | safe_place VARCHAR(32), |
| 36 | instructions VARCHAR(32) |
| 37 | ); |