Mastering SQL - PostgreSQL: Pre-defined Functions - Handling NULL Values

In PostgreSQL, NULL values are treated specially and need to be handled properly in SQL queries. In this tutorial, we’ll cover how to handle NULLs using PostgreSQL’s built-in functions like COALESCE, NULLIF, and more. Learn how to replace NULL values with default values, perform comparisons with NULLs, and ensure your queries return accurate results even when dealing with missing or incomplete data.

What this video covers:
✔️ Understanding NULL values and their behavior in PostgreSQL
✔️ Using COALESCE to replace NULL with default values
✔️ How to use NULLIF to compare values while handling NULLs
✔️ Practical examples with NULLs in queries
✔️ Best practices for handling NULLs in PostgreSQL

💡 Master handling NULL values and improve the accuracy of your queries!

Timestamps
* 0:00 - Introduction to handling NULL values in PostgreSQL
* 0:13 - Using COALESCE to replace NULL with default values
* 1:09 - Using NULLIF to compare values and handle NULLs
* 2:25 - Example: Handling NULLs in commission amounts
* 3:45 - Best practices for handling NULLs in SQL queries

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