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Kim Younghan's Practical Database Introduction - SQL First Steps for All IT Professionals (Step by Step from SQL)

Not only developers, but also planners and data analysts learn databases step-by-step, starting from SQL basics.

(5.0) 256 reviews

5,723 learners

  • yh
데이터베이스
DBMS/RDBMS
sql
mysql
SQLD
SQL
MySQL
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Reviews from Early Learners

What you will learn!

  • Database

  • Basic SQL

  • SQL - Data Management

  • SQL - Query & Sort

  • SQL - Data Processing

  • SQL - Aggregation and Grouping

Korea's #1 in cumulative students in the development field,
Kim Young-han's Practical Database

Trendy technology? What's more important is database fundamentals!

I'm Younghwan Kim, CTO of Woowa Brothers, with over 500,000 cumulative students
Why I created a database course

•••

"I wanted to create a database course that contains the fundamentals truly needed for practical work."

The heart of all services,
Database

Why is studying databases important?

The core of every service we create lies in the database.
The database is like the 'heart' that drives software.

In other words, it's the foundational technology for all applications for developers, and an essential skill that planners and analysts must know to understand and utilize data. To implement good products and services and make accurate decisions, databases are fundamental skills needed by all job functions.

Roadmap Series First Edition, SQL First Steps for All IT Professionals

We help improve the fundamentals for all job functions
including developers, planners, analysts, marketers, and more.

Junior/job-seeking developers who want to build a solid foundation in databases

Data-driven decision-making planners/marketers

SQL skills development for
data analysts

This course is the first course in the practical database roadmap, targeting all IT professionals who want to build a solid foundation in databases. We've minimized complex explanations and structured it so you can naturally learn by writing SQL directly.

What the course covers

Database Core Concepts
Data Management (Data Addition, Modification, Deletion)
Data Query and Sorting (Select)
Data Processing
Data Aggregation and Grouping (Group by)

Kim Younghan's "Practical Database Roadmap" is

📘Developer Learning Track

We recommend following the complete roadmap. It contains everything from database fundamentals to essential DB design knowledge, and practical tuning strategies for becoming an advanced developer.

📘 Planner/Analyst/Marketer Learning Track

By taking the Beginner and Basic courses, you can cover all the essential SQL needed for practical work. If you dream of becoming a data product lead, I recommend taking the Advanced course as well.

Introduction to Roadmap Structure Lectures and Guide Videos

Frame 66

From the basics to exceptional lectures
Proven by 500,000+ students.

⭐⭐⭐⭐⭐

I was often moved by the step-by-step sequences and materials that could only come from deep thinking from a beginner's perspective. Just as the current lectures have been for me, I hope you will continue to create lectures that can extend a helping hand to people who are lost and struggling like I was back then. Thank you!

"Spring Boot - Core Principles and Applications"
Course Reviews

⭐⭐⭐⭐⭐️

I only knew how to do CRUD, and when I occasionally encountered DB issues, even after googling, the knowledge was fragmented and seemed to have gaps somewhere, but this is a lecture that fills those gaps. ... I guess fundamentals are important after all. And I don't think there's anyone who can establish those fundamentals as well as Younghan-nim.

"Spring DB Part 1 - Core Principles of Data Access" Course Reviews

⭐⭐⭐⭐⭐

It's truly the best. While taking other courses, I had questions like "Why do they use it this way?" and all those unresolved doubts and questions I had while self-studying like "Why does this part work this way??" are all clearly explained. ... If you've had the experience of not being able to cleanly resolve your questions while studying alone, I really highly recommend this. I'm really looking forward to the intermediate and advanced courses too.

"Kim Younghan's Practical Java - Basic Edition"
Course Reviews

⭐⭐⭐⭐⭐

Showing how things actually work by keeping the web browser developer tools open throughout the lecture and demonstrating the actual operation was what made me think "Oh, so this is how the parts I'm actually studying work!" and became a catalyst for developing more interest. ... Please continue uploading many lectures and spreading positive influence to many people. Thank you for the lecture, I enjoyed listening to it. ^^

"HTTP Web Basics for All Developers" Course Reviews

⭐⭐⭐⭐⭐

I was truly grateful for the practical lectures and detailed explanations you provided, as well as your thoughtfulness in explaining previous topics once more. ... Due to the limitations of government-funded education, I couldn't collapse like this and found your lectures while searching, and I feel like my life is going to change thanks to them. With the goal of working at the same company as you as a developer, I will strive to become a competent developer. Thank you sincerely.

"Spring Core Principles - Basic Edition" Course Reviews

⭐⭐⭐⭐⭐

I was able to get a big picture of what I could build with Spring, and instead of just teaching the technology randomly, you naturally built it up from start to finish by showing how these technologies were introduced to solve inefficiencies or problems that arose while writing code, so I was able to learn smoothly and well!

"Introduction to Spring - Learn Spring Boot, Web MVC, DB Access Technology with Code"Course Reviews

Recommended for
these people

Who is this course right for?

  • Aspiring developer

  • Developer who studied databases but wants to solidify the basics

  • Planners, Marketers, Data Analysts wanting to learn SQL

  • To all in IT industry

Need to know before starting?

  • A lecture for database beginners.

  • You only need to know how to use a computer :)

Hello
This is

560,336

Learners

37,062

Reviews

8,987

Answers

5.0

Rating

25

Courses

진짜 실무에 필요한 제대로 된 개발자가 될 수 있도록, 교육하는 것이 저의 목표입니다.

 

저의 개발 인생 이야기

EO 인터뷰 영상

개발바닥 - 시골 청년 개발왕 되다

취업과 이직에 대한 고민 해결

 

Curriculum

All

53 lectures ∙ (8hr 37min)

Course Materials:

Lecture resources
Published: 
Last updated: 

Reviews

All

256 reviews

5.0

256 reviews

  • aoss123님의 프로필 이미지
    aoss123

    Reviews 4

    Average Rating 5.0

    5

    30% enrolled

    • jinhinjala26님의 프로필 이미지
      jinhinjala26

      Reviews 5

      Average Rating 5.0

      5

      30% enrolled

      • tjqwns9282님의 프로필 이미지
        tjqwns9282

        Reviews 20

        Average Rating 5.0

        5

        30% enrolled

        이번에 데이터 베이스 강의를 오픈하셨네요~ 영한님 강의 보면서 공부해서 지금 직장 생활 중이에요 일하면서 느낀게db는 Sql도 중요하지만 db 자체에 대해서 잘 알고 활용하는게 중요하다 느껴서 복습 겸 차근차근 공부 중입니다. 항상 잘 배우고 있습니다~

        • 김영한
          Instructor

          tjqwns9282님 감사합니다 :) 취업 이후에도 지속적으로 잘 공부하고 계시군요. 응원합니다!

      • widn45님의 프로필 이미지
        widn45

        Reviews 26

        Average Rating 5.0

        5

        30% enrolled

        강의 퀄리티가 정말 좋네요! 다 아는 내용인데도 한번 더 듣게되는.. magic 좋은 강의 감사합니다~

        • 김영한
          Instructor

          widn45님 열심히 들어주셔서 고맙습니다!!!

      • 나구리님의 프로필 이미지
        나구리

        Reviews 24

        Average Rating 5.0

        5

        100% enrolled

        안녕하세요 영한님! 원래는 수강폄을 강의 전부 보고 남기는데.. 영한님의 강의 내용을 모두 기록하면서 수업을 듣다보니 너무 오래걸릴것 같아서 영한님 강의로 1년 10개월간 공부한 덕분에 신입으로 취업하게 되었다는 감사의 말씀을 빨리 전하고 싶어 수강 도중에 수강평을 남깁니다..ㅎㅎ 취업한 회사는 백엔드가 올해까지는 코틀린 + 스프링으로, 2026년은 타입 스크립트 + nestjs로 전환되지만 영한님의 강의로 다져진 기본기와 자신감 덕분에 어떤 언어와 프레임워크로 전환이 되더라도 이해하려고 노력하면 할 수 있을 것 같습니다. 영한님 강의에서 배운 근본부터 쌓아올린 지식 덕분에 취업시장이 어려움에도 개발자가 되기를 포기하지 않을 수 있었고, 맨땅에 헤딩으로 모르는 사람들과 사이드 프로젝트도 해볼 수 있었고, 부트캠프 조차도 항상 상위권 그룹에 속해서 잘하는 사람들과 함께 성장하며 결과물을 낼 수 있었고, 그 결과가 비록 유명하고 훌륭한 IT 업계의 회사는 아니지만, 취업이 어려운 시기임에도 결실을 맺을 수 있었습니다. 영한님 강의 끝에 말씀해주시는 다음으로에서나 컨퍼런스 혹은 특강에서 종종 해주셨던 말씀처럼 지원한 수 많은 회사중에서 많이 연락이 안올지라도 어딘가에는 저를 뽑아주는 회사가 존재했었습니다ㅋㅋㅋ 이제 진짜 시작이라는 마음으로 짧게 타오르는것이 아니라 오래 지속 가능한 개발자가 되도록 정진하겠습니다! 너무너무 감사드리며 항상 존경합니다! 시간은 걸리겠지만 주말에 틈틈히 입문, 기본 모두 완강해서 수강평으로 뵙겠습니다

        • 김영한
          Instructor

          우와~ 나구리님 진심으로 축하해요 :) 자바와 스프링을 제대로 공부하신 덕분에 부트캠프에서 상위권을 유지하고 또 그 덕분에 다른 많은 분들이 나구리님께 질문하고, 그러면서 나구리님은 더 잘 성장하실 수 있었을 것이라 생각합니다. 이제 진짜 시작이네요. 저도 항상 응원하겠습니다^^!

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