Constraints in SQL

Date: 2022-09-08

This tutorial demonstrates SQL constraints using PostgreSQL in a Docker environment. It covers several constraint types: NOT NULL, PRIMARY KEY, DEFAULT, CHECK, and FOREIGN KEY. The tutorial uses practical examples to show how these constraints enforce data integrity, preventing insertions of invalid data. Each constraint type is illustrated with SQL queries and their expected behavior, highlighting error scenarios when constraints are violated. The setup involves creating tables and inserting data to showcase the constraints in action.

Read more: https://examples.javacodegeeks.com/constraints-in-sql/