Understanding and Handling NULL Values in SQL
When working with SQL, one of the most confusing concepts for beginners is dealing with NULL values. NULL doesn’t represent […]
Understanding and Handling NULL Values in SQL Read Post »
Normal Forms: 1NF, 2NF, 3NF, and BCNF
Previously, we introduced the concept of normalization vs. denormalization explaining how database designers utilize each approach. Now, let’s dive deeper
Normal Forms: 1NF, 2NF, 3NF, and BCNF Read Post »
Data Structure Comparison: Normalization vs. Denormalization
When designing a relational database, one of the most important decisions you’ll make is how to structure the data. Should
Data Structure Comparison: Normalization vs. Denormalization Read Post »
Database Constraints: Ensuring Accuracy and Consistency
Constraints are rules applied to columns and tables in a database to enforce data integrity, prevent invalid data, and make
Database Constraints: Ensuring Accuracy and Consistency Read Post »
Database Relationships: Understanding Cardinality
Before diving into data modeling, it’s important to understand cardinality — one of the foundational ideas in relational databases. Cardinality
Database Relationships: Understanding Cardinality Read Post »
Database Design Schemas: Star, Snowflake, and Galaxy
When working with databases, you might hear the word schema used in different ways. It’s important to know that a
Database Design Schemas: Star, Snowflake, and Galaxy Read Post »
Database Processing Systems: OLTP vs. OLAP
When people talk about database processing systems, they’re referring to the way a database is designed to handle different types
Database Processing Systems: OLTP vs. OLAP Read Post »
Error Handling, Troubleshooting and Debugging: What’s the Difference?
When you’re learning SQL, you’ll quickly run into words like error handling, troubleshooting, and debugging. They sound similar—and in some
Error Handling, Troubleshooting and Debugging: What’s the Difference? Read Post »
SQL Formatting Best Practices
When you’re just starting out with SQL, it’s easy to think there’s only one “right” way to write a query.
SQL Formatting Best Practices Read Post »