PostgreSQL Database Design for E-commerce

PostgreSQL Database Design for E-commerce

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Building an efficient database is crucial for managing e-commerce data. This article provides a concise guide to designing and building a PostgreSQL database for an online store.

Set up the database structure

We need three primary tables: Items, Customers, and Orders. Using data normalization helps in reducing redundancy by creating relationships using foreign keys.

Items Table

  • item_id (Primary Key)

  • item_name

  • item_category

  • item_price

Customers Table

  • customer_id (Primary Key)

  • customer_firstname

  • customer_lastname

  • customer_address

Orders Table

  • order_id (Primary Key)

  • customer_id (Foreign Key)

  • item_id (Foreign Key)

  • items_bought

Creating Tables

Create the above described tables.

CREATE TABLE items (
  item_id SERIAL PRIMARY KEY,
  item_name VARCHAR(50),
  item_category VARCHAR(50),
  item_price INT
);

CREATE TABLE customers (
  customer_id SERIAL PRIMARY KEY,
  customer_firstname VARCHAR(50),
  customer_lastname VARCHAR(50),
  customer_address VARCHAR(100)
);

CREATE TABLE orders (
  order_id SERIAL PRIMARY KEY,
  customer_id INT REFERENCES customers(customer_id),
  item_id INT REFERENCES items(item_id),
  items_bought INT
);

Then you can start importing data and creating Views.

CREATE VIEW TotalOrders AS
SELECT orders.order_id, customers.customer_firstname, customers.customer_lastname, items.item_name, items.item_category, items.item_price, orders.items_bought, customers.customer_address, items.item_price * orders.items_bought AS spend
FROM orders
INNER JOIN customers ON orders.customer_id = customers.customer_id
INNER JOIN items ON orders.item_id = items.item_id;

FAQ

How to install PostgreSQL?

Visit the PostgreSQL website, download the installer, and follow the installation instructions.

What is QuickDBD?

QuickDBD is a tool for designing database diagrams and generating SQL code.

Connecting Postgres to DbVisualizer?

Launch DbVisualizer, create a connection, choose the Postgres driver, and provide the required connection details.

Visualizing data in DbVisualizer?

DbVisualizer supports chart creation, allowing for visual representation of table data.

Conclusion

This guide outlines the steps to design, build, and manage a PostgreSQL database for e-commerce. For a detailed walkthrough, read the article How To Design And Build A Database In Postgres.

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