Summary of basic database and operating system concepts

Through this course, students can learn the overall flow of IT.

Through this course, students will learn overall knowledge of HTML, CSS, and JS.

There are no special Next.js techniques that you can only learn by working in the field. I will explain based on the latest official Next documentation.

There are no special React techniques that you can only learn by working in the field. The basics are enough. I will explain based on the official React documentation.

Through this course, students will learn the structure of computers and the overall concepts and flow of networks.

Through this course, students will be able to learn the overall concept of algorithms.

Through this course, students will learn the overall concepts of data structures.

Through this lecture, students can create a web service similar to Instagram using HTML, CSS, and JS. (Only the front-end is implemented! The back-end server construction will be filmed in a later lecture.)

A beginner's guide to SQL coding! We'll teach you the secrets of writing, interpreting, and validating SQL.

Learn common components of global-scale services through popular papers, books, and articles.

It provides a key guide to understanding the internal mechanisms of Oracle DB architecture and growing as a performance tuning and performance analysis expert.

SQL data analysis! We will teach you how to solve practical problems that are applicable in the field, quickly and easily!

Learn practical strategies for designing efficient and scalable database structures that accurately reflect the complex requirements of real-world scenarios.

This is Part 1 of a roadmap lecture that concisely organizes the essential computer science (CS knowledge) needed to excel in development and data, in a short period. This lecture has also been used as an in-house lecture at top domestic companies for several years. Based on 20 years of experience in actual practice, from system SW to web, app development, and data science, this lecture systematically yet easily organizes the essential core knowledge needed to excel in development and data.

"I have a backend technical interview in a week, what should I start with?" The secret to answers that make interviewers nod in approval Master the actual answer patterns of Naver, Kakao, Coupang, and Toss successful candidates in just 3 days!

CS knowledge lectures on design patterns, networks, operating systems, databases, etc. from the author of the #1 book in Korea, "CS Major Knowledge Notes for Interviews"! Covers all the concepts needed for CS interviews and the latest past questions!

Analysis of CS major interview questions [Operating system/data structure/algorithm/database/network]!

[Web Dev Beginners Only] Build a Spring Boot REST API easily, step-by-step, fully understanding JPA.

Learn how to analyze 5 million Korean apartment transaction data using PostgreSQL. Covers the process of data cleaning, transformation, and deriving meaningful insights through various SQL queries.

Welcome to AWS? First Time? Let's learn together, from the basics of modern web systems to cloud deployment. It's not just simple AWS usage or following along with code; you can learn deeply how even difficult CS concepts are applied in the Cloud!

Have you ever wondered why we use these techniques while watching the Clone Coding lecture? Let me give you a big picture of backend development!

I have been working in the IT field for 20 years in development and construction. I would like to be a good guide for those who are entering or starting out in the development field.

We will explain the core computer architecture and operating principles that SW developers need to know in an easy-to-understand manner through illustrations.

This course teaches MS-SQL through baseball/company databases.

Immutable truths for developers/engineers that will never change even in the AI era! We provide essential computer science knowledge for free to prepare for developer/engineer job applications and technical interviews.

A course that helps you understand core operating system concepts and practice explaining them verbally for interviews

By implementing various practical data analysis cases using SQL, you can simultaneously improve your data analysis and SQL utilization skills.

This is a course on creating practical Unity games with databases. You can work through the difficult-to-approach parts through the lectures.