Creating tables

CREATE TABLE products ( _id VARCHAR(10) PRIMARY KEY, price FLOAT, stock INT, created_at VARCHAR(10), last_updated VARCHAR(10), user_updated VARCHAR(10) );

CREATE TABLE products_infos ( _id VARCHAR(10) PRIMARY KEY, name VARCHAR(255), description TEXT, volume FLOAT, weight FLOAT, brand VARCHAR(255), model VARCHAR(255) );

CREATE TABLE users ( uid SERIAL, username VARCHAR(10) NOT NULL UNIQUE, password VARCHAR(255) NOT NULL, is_admin INT, PRIMARY KEY (uid) );