Category: MySQL

Introduction to MySQL Come, sit comfortably! Today we’re starting our MySQL journey from the very beginning. I’ll explain everything slowly, with real-life examples, just like I would in a classroom. No rush, no jargon...

Today we’re going to build the foundation of everything we’ll do in MySQL. If you understand these basic concepts really well, the rest of the course will feel like a breeze. So let’s take...

Creating and Managing Databases We’re going to do everything step-by-step, with real examples, copy-paste commands, and what you will see on your screen. Just open your MySQL command line or Workbench and follow along....

This is where we start building the real structure inside our database. Tables are the heart of any database — everything else (data, queries, relationships) lives inside tables. Today we’ll learn how to: Create...

This is the chapter where we finally start playing with real data! Up to now we created the structure (databases & tables). Now we will: Add data (INSERT) Read data (SELECT) Change data (UPDATE)...

The SELECT statement is what you will use 80–90% of the time when working with databases. It’s how you ask questions to your data and get answers back. Today we’ll master: Selecting only the...

Now we’re going to level up our WHERE clause and make our SELECT queries super powerful! In the last chapter we learned basic filtering. Today we’ll master: Combining conditions with AND, OR, NOT Removing...

This is a super important chapter because now we move from just looking at individual rows to analyzing the big picture! Aggregate functions help us answer questions like: How many students do we have?...

Joins are what make relational databases magical. They let us connect different tables using common columns (usually primary key and foreign key) and combine data from multiple tables in one beautiful query. Today we’ll...

A subquery (also called a nested query) is simply a query inside another query. It’s like asking a small question to get an answer, and then using that answer to ask the big question....