SQL Server Real-World Projects: Building an E-Commerce Platform

Design the E-Commerce Database Schema

Create a SQL Server database schema for an e-commerce platform including tables for Products, Customers, Orders, OrderDetails, and Payments with appropriate keys and constraints.

Expected output: A normalized database schema script with tables and constraints.

Hint: Focus on defining primary keys, foreign keys, and data types suitable for each entity.

Write a Stored Procedure for Order Creation

Implement a stored procedure that inserts an order and its details, checks stock availability, and updates product stock within a transaction.

Expected output: A tested stored procedure script that manages order creation atomically.

Hint: Use transactions and handle errors to maintain data integrity.

Create Indexes to Optimize Queries

Add indexes to your e-commerce database to improve query performance on common search and join columns.

Expected output: SQL scripts creating clustered and non-clustered indexes.

Hint: Identify columns used in WHERE clauses and JOIN conditions.

I would identify core entities such as Products, Customers, Orders, OrderDetails, and Payments, define primary keys for each, and establish foreign key relationships to maintain data integrity. Normalization would be applied to reduce redundancy.

Stored procedures encapsulate business logic, ensure consistent data operations, improve security by controlling access, and can optimize performance by reducing client-server communication.

Creating clustered indexes on primary keys, non-clustered indexes on foreign keys and frequently queried columns, and regularly maintaining indexes by updating statistics and rebuilding them improves query speed.