SQL Databases 101 in the Era of Vibe Coding | PostgreSQL | Step by step Tutorial
This video is a beginner-friendly SQL tutorial that shows you how to create and update a database table step-by-step.
Follow along with the hands-on code after explaining key database concepts and terminology. Because everything begins with a strong foundation.
You will learn how to create tables, insert data, update and delete records, and even remove tables (with some real-life use cases and tips along the way).
After covering the basics, I am going to cover more advanced topics, including the relations between different tables, where relational databases really shine.
Once the basics are clear, I will introduce more advanced topics, such as table relationships: the simplest one-to-one, one-to-many, and the most complex many-to-many — the core strength of relational databases.
Note: unfortunately, my camera stopped working when I got into these concepts, so this video only covers the foundation of the SQL databases, and I will re-record the rest in the next video(s).
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I would love to hear your thoughts and feedback, so feel free to comment below, even if you have a different opinion or would like to learn something in particular! I will be happy to hear from you.
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These are the timestamps if you would like to go into a specific section of the video:
00:00 Importance of a solid foundation in data and databases in the era of AI and Vibe Coding
00:19 Discussing the significance of database design for app scalability and performance
00:45 Intro to Database 101 tutorial and overview of data and database concepts
02:54 Explanation of database and queries; introduction to SQL
04:03 What is a table in a database? Structure of tables with rows and columns
05:05 Example of a Users table with Primary Key and Attributes
06:13 Introduction to pgAdmin 4 interface for hands-on database management - Postgres
06:39 Creating and managing databases in pgAdmin 4
07:40 Creating the first table (Users) and defining columns and constraints
09:00 Tips on timestamp columns (created_at, updated_at) with default current timestamp
09:52 Running and confirming successful table creation
10:17 Inserting data into the Users table with example entries
11:18 Handling table existence with "IF NOT EXISTS" clause
11:47 Querying data from the Users table; simple SELECT examples
13:20 Updating records in the table with the UPDATE command
14:20 Deleting user data with the DELETE command and explanation of practical use cases
15:44 Dropping the Users table to clean up
16:13 Introduction to a more complex example: designing a library database
16:33 Use case for the library database with books, authors, and visitors
17:20 Assumptions about relationships between authors and books (one-to-many)
17:56 Starting to create the tables authors and books for the library database (many-to-many)
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Disclaimer: Everything presented in this video is my own opinion and is intended to educate and share information. Nothing mentioned or described here constitutes legal or financial advice. Ruslan Brilenkov is not responsible for any profits or losses associated with your investment. So, please be responsible for your own actions.