apple store db

dumps/students/s_04/appleStore.sql

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+DROP TABLE IF EXISTS products CASCADE;
+DROP TABLE IF EXISTS clients CASCADE;
+DROP TABLE IF EXISTS clients_products CASCADE;
+DROP TABLE IF EXISTS sellers CASCADE;
+DROP TABLE IF EXISTS sellers_clients CASCADE;
+DROP TABLE IF EXISTS stores CASCADE;
+
+
+
+CREATE TABLE products (
+  id                  SERIAL PRIMARY KEY,
+  code_id             SMALLINT NOT NULL CONSTRAINT positive_id CHECK ( code_id > 0 ),
+  title               VARCHAR(50) NOT NULL,
+  small_description   TEXT   
+);
+
+CREATE TABLE clients (
+  id                SERIAL PRIMARY KEY,
+  first_name        VARCHAR(50) NOT NULL,
+  last_name         VARCHAR(50),
+  tel_number        CHAR(13),
+  email             VARCHAR(50) CONSTRAINT proper_email CHECK (email ~* '^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+[.][A-Za-z]+$')  
+);
+
+
+CREATE TABLE clients_products (
+  id               SERIAL PRIMARY KEY,
+  client_id        INT NOT NULL REFERENCES clients (id),
+  product_id       INT NOT NULL REFERENCES products (id)
+);
+
+
+CREATE TABLE sellers (
+  id                SERIAL PRIMARY KEY,
+  first_name        VARCHAR(50) NOT NULL,
+  last_name         VARCHAR(50) NOT NULL,
+  seller_id         INT NOT NULL,
+  rang              VARCHAR(50) NOT NULL   
+);
+
+CREATE TABLE sellers_clients (
+  id               SERIAL PRIMARY KEY,
+  client_id        INT NOT NULL REFERENCES clients (id),
+  seller_id        INT NOT NULL REFERENCES sellers (id)
+);
+
+CREATE TABLE stores (
+  id                SERIAL PRIMARY KEY,
+  city              VARCHAR(50) NOT NULL,
+  country           VARCHAR(50) NOT NULL,
+  numb_of_staff     SMALLINT NOT NULL CONSTRAINT number_of_staff CHECK ( numb_of_staff > 0 )
+);
+