10 SQL Queries Every Beginner Should Know (With Real Data Examples)

Learn the 10 most essential SQL queries every beginner should master — with real-world examples from customer, order, and employee data!

In this step-by-step SQL tutorial, I’ll walk you through each query using sample datasets and explain what each one does, how it works, and why it matters.

Whether you're learning SQL for data analysis, data science, or web development, these core commands will set a strong foundation.

✅ What you'll learn:
• SELECT * and filtering specific columns
• WHERE, ORDER BY, and LIMIT
• COUNT, GROUP BY, and simple JOIN
• How to UPDATE and DELETE rows safely
• Real examples using pgAdmin or SQLite

** Download the sample dataset (CSV & Excel) here:
👉 GitHub link: https://github.com/data-geek-lab/10-sql-queries-for-beginners

📌 Tools used: PostgreSQL, pgAdmin, SQLite:
Video on how to download PgAdmin: https://youtu.be/IcJvVUln-KY?si=XggTtkwLqXXrpIwQ

Video on how to download Anaconda Navagtor to use different software:
https://youtu.be/ImhtTEfQafo

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📺 Chapters:
0:00 Intro
0:21 Open Postgres (pgAdmin)
00:47 Explore the tables in the Database
02:37 #1: SELECT all columns from table SQL database (SQL basic)
02:15 #2: SELECT specific columns
06:37 #3: using a WHERE clause (Filters rows based on a condition)
08:09 #4: ORDER BY clause (Sorts your results)
09:18 #5: LIMIT/TOP (Returns a specific number of results)
10:07 #6: COUNT function (Counts the values in the table)
11:19 #7: GROUP BY function (Groups data for summary stats)
12:22 #8: JOIN function to join two tables (Combines rows from two tables using a related column)
13:57 #9: UPDATE function (Modifies existing data)
15:20 #10: DELETE function (Removes records from a table) be very careful using this function

#SQLTutorial #SQLForBeginners #PostgreSQL #pgAdmin #LearnSQL #dataanalytics

Thank you for watching!
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Видео 10 SQL Queries Every Beginner Should Know (With Real Data Examples) канала Data Geek is my name