4. Example Code for Truncating a Foreign Key Constrained Table in MySQL
   Understanding the Concept:Foreign Key Constraint: A foreign key is a column in a table that references a primary key or unique column in another table
5. Example Codes for "Insert if not exists" in SQLite
   In SQLite, you don't have a built-in "Insert if not exists" command. However, you can achieve this functionality using two main approaches:
6. Enforcing Referential Integrity in PostgreSQL with ON DELETE CASCADE
   This principle ensures that the relationships between tables in a database are consistent.For instance, imagine a database that stores information about customers and their orders
7. Crafting Unique Data Integrity in SQL Server 2005: A Guide to Unique Constraints
   SQL (Structured Query Language): It's a language for interacting with relational databases like SQL Server. It allows you to create