SQL Class 2: CREATE TABLE & GROUP BY Explained with Examples

Описание: Welcome to SQL Class 2 of our Beginner-to-Job-Ready SQL Series!
In this session, you’ll learn how to create tables in SQL and how to group data using GROUP BY, which are essential skills for every data and backend role.

⭐ What you’ll learn in this class:
🔹 1. CREATE TABLE in SQL

What is CREATE TABLE?

Table structure: columns & data types

Defining primary keys

Using constraints (NOT NULL, UNIQUE, DEFAULT)

Real-world table design examples

🔹 2. Understanding GROUP BY

What is grouping in SQL?

Why GROUP BY is important

Grouping data using one or multiple columns

Using aggregate functions:
COUNT(), SUM(), AVG(), MIN(), MAX()

Common mistakes and best practices

🔹 3. Practical Examples

Grouping employee data

Sales and reporting use cases

Interview-level queries

🎯 Who should watch this?

Freshers preparing for SQL interviews

Working professionals upskilling in data

Non-technical learners entering IT

Students targeting careers in:
Data Engineering, Data Analytics, Backend Development, BI & Cloud

🚀 Why this class is important?

Table creation is the base of database design

GROUP BY is heavily used in analytics & reporting

Frequently asked in SQL interviews

Essential for real-world data projects

📌 Part of the SQL Beginner Series

This is Class 2 of the SQL learning path.
Upcoming classes will cover:
INSERT, UPDATE, DELETE, WHERE, HAVING, JOINS, Subqueries & Projects.

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