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Programming

/

Database

Do it! Introduction to SQL with Oracle - Taught by the Author

Based on Oracle 21C, from concepts to practice, the easiest way to learn SQL for beginners! Taught directly by the author of Easyspub's "Do it! Introduction to SQL with Oracle"! Designed for non-majors and beginners, explained step by step.

(4.3) 6 reviews

31 learners

Level Beginner

Course period 4 months

SQL
SQL
Oracle
Oracle
DBMS/RDBMS
DBMS/RDBMS
database
database
data-analysis
data-analysis
SQL
SQL
Oracle
Oracle
DBMS/RDBMS
DBMS/RDBMS
database
database
data-analysis
data-analysis

Reviews from Early Learners

4.3

5.0

Jeich

100% enrolled

I've tried learning databases and SQL multiple times but always gave up halfway through, but thanks to this course, I was able to complete it. Since the instructor is the book's author who taught directly, it connected well with the book content, and having a separate textbook made it much easier to review and keep up with the progress. It was great that all content from the beginning to the end of the book was covered, allowing me to get an overview of SQL as a whole. In particular, I think it was good that the instructor showed coding in real-time and gave separate practice time in between, making it feel like taking a real-time class even though it was online. For the most important parts in practice like SELECT statements, over 15 hours were allocated for in-depth explanations, and the instructor directly solved the 'review problems' at the end of each chapter, which was fun and helpful. Although it was a long course of over 29 hours and wasn't easy to watch completely, I don't think there's any content to skip. I recommend this to those who find it difficult to study alone and prefer having a book alongside.

5.0

keulseok

61% enrolled

I am preparing for the SQLD certification exam, and this is very helpful. Thank you.

5.0

์•„๋‡ฝ

100% enrolled

As a non-major preparing for a career change to the IT industry, I really felt the need to study SQL, and I learned about this course through a friend's recommendation. After taking the course, I understood why they recommended this book and course. It was great to be able to learn focusing on the core grammar essential for practical work, and the process of naturally learning through repeating examples and solutions was a huge help. The instructor's explanations were also Kind and easy to understand, so it wasn't difficult to follow along, and it was really meaningful to be able to feel the actual work experience. When I studied only with books, it wasn't easy to keep going consistently on my own, but like other reviews mentioned, having you display the stopwatch and give us time to solve problems made it feel like taking a real-time class even though it was an online course, which was really great๐Ÿ‘ Thanks to this, I wasn't bored throughout my studies, and even as a non-major, I was able to gradually gain confidence. I think choosing to take the course instead of just reading the book was a really good decision! Thank you for being such a great help in my job change preparation, and now I'm going to go through it thoroughly one more time :D

What you will gain after the course

  • Database Concepts

  • SQL Fundamentals and Applications

  • Oracle Database

๐ŸŽ“ Course Overview

Practical Database & SQL Course - Complete Everything with This One Course

  • The course is conducted directly by an instructor selected as an Oracle ACE for contributions to the Oracle technical community.

  • This is a course taught directly by the author of "Do it! Learning SQL with Oracle".
    From beginners learning SQL and databases for the first time to professionals who need to work with DBMS/RDBMS in practice, you can learn through a complete flow from concepts โ†’ practical examples โ†’ practice problem solving.

  • Based on an Oracle-based practice environment, this course includes SQL syntax, data manipulation/definition, permission management, and solutions to all review problems, making this single course sufficient without any additional lectures needed.

โ€ป For inquiries about corporate/institutional on-site training and group education, please refer to [Corporate Training Inquiry] on the ๐Ÿ”—[Introduction] page.

๐Ÿ‘จโ€๐Ÿซ About the Author & Instructor

A 15-year veteran developer & data scientist with experience in both practical work and education

๐Ÿ‘ฅ Recommended for

  • Complete beginners with no SQL knowledge or non-technical background

  • Professionals who need to work with Oracle, DBMS, RDBMS, and SQL in their jobs

  • Those who want to organize their SQL knowledge or haven't grasped the flow yet

  • Learners studying SQL through government-funded programs, bootcamps, university courses, etc.

  • Those who want to learn properly with just one course rather than multiple short lectures

๐Ÿ“ˆ What You'll Gain from This Course

  • You can clearly understand the structure of databases and the basic syntax of SQL.

  • You will learn all the essential practical skills including SELECT, GROUP functions, JOIN, subqueries, DML/DDL, and user/permission management.

  • We practice and solve over 320 examples from the textbook and all review problems (chapter exercises) together.

  • You can grasp concepts centered on "why we write it this way" rather than just a simple listing of grammar.

  • You can complete everything from SQL basics to practical application with just this one course.

๐Ÿ“š Course Structure Summary

  • Part 1: Database Fundamentals, Environment Setup
    โ†’ 5 lectures / 2 hours 49 minutes

  • Part 2: Data Retrieval Using SELECT Statements
    โ†’ 25 lectures / 15 hours 14 minutes

  • Third Section: DML/DDL/Constraints/Objects
    โ†’ 17 lectures / 9 hours 35 minutes

  • Appendix A: User, Permission, and Role Management
    โ†’ 3 lectures / 1 hour 00 minutes

  • Wrap-up: Overall Summary and Review
    โ†’ 1 lecture / 23 minutes

A total of 51 lectures, approximately 29 hours and 3 minutes in length,
covering over 320 examples from the ใ€ŠDo it! Learning SQL with Oracleใ€‹ textbook and
practicing and solving all review problems (chapter exercises) together.

๐Ÿง  What are "Dosaegim" (Review) Problems?

These are practice problems included at the end of each chapter in the textbook,
consisting of SQL problem types that frequently appear in actual work and assessments.
In this course, we directly practice and solve all review problems to train not only grammar understanding but also SQL problem-solving skills.

๐Ÿ›  Practice Environment and Tools

  • Oracle Database 21c Express Edition

  • SQL Developer (Oracle's official free GUI tool)

Operating System Requirements

  • Can be installed on Windows Pro / Enterprise / Education editions

  • Windows Home edition users need to install Oracle 11g Express Edition (21c installation not supported)

  • โ€ป macOS is not an officially supported operating system by Oracle, but installation is possible through separate configuration and there will be no issues proceeding with the class after installation. (However, macOS installation methods are not covered in the course)

The course provides necessary installation guides and practice data files.

๐Ÿ“˜ Prerequisites and Notes

  • You can take this course even without programming experience or major-related knowledge.

  • We explain step by step from basic concepts so that even non-majors can follow along.

  • This course requires the textbook "Do it! Introduction to SQL with Oracle."
    The lectures follow the flow of the textbook and practice all examples and review problems together.

๐ŸŒŸ What Makes This Course Different

  • โœ” Direct instruction from an Oracle ACE selected instructor recognized by Oracle Corporation for technical contributions

  • โœ”The only official lecture by the author of "Do it! Learning SQL with Oracle"


  • โœ”29 hours of extensive hands-on lectures

  • โœ”320+ textbook examples, complete problem solutions provided

  • โœ”A comprehensive course that will satisfy both beginners & practitioners


  • โœ”Complete learning design that flows from concept understanding โ†’ practical application โ†’ problem solving

  • โœ”Structured to master everything from SQL basics to practical application in a single course

๐ŸŽ Complete 100% of the course and receive bonus materials!

For those who complete 100% of the course and finish everything (we will guide you via automated message):

โœ… [1] Write an Inflearn course review
โœ… [2] Complete the Google Form survey


๐Ÿ“˜We will send you the following materials via email that are not included in the textbook or this course, but are currently being used in actual employee training programs:

  • Group Functions / Window Functions / Analytical Functions PDF

  • SQL Practice Code Appendix

Your feedback is a great help in improving the quality of the course.
We appreciate your participation. ๐Ÿ˜Š

Recommended for
these people

Who is this course right for?

  • Anyone who wants to learn SQL for the first time

  • Entry-level Software Engineer and Developer

  • Various practitioners including working engineers, data analysts, and data scientists who need to utilize databases in their work

Need to know before starting?

  • No! If you have the textbook ready, you can start learning right away without any basic prior knowledge. However, please make sure you have plenty of passion and time!

Hello
This is groovysunday

31

Learners

6

Reviews

3

Answers

4.3

Rating

1

Course

I am currently active as an Oracle ACE. With a background in Computer Science, IT Consulting, AI, Statistics, Mathematics, and Data Science, I work as both a software developer and a data scientist. I contribute to the IT industry through various external activities, including lecturing, writing, and mentoring. I also plan and produce the developer podcast "Survival-type Developer Matchstick's Unkind Coding Stories," where I share diverse practical experiences and know-how.

[๐Ÿ”—Inquiry for Corporate Training] [๐Ÿ”—Go to Inflearn Mentoring] [๐Ÿ”—View Oracle ACE Profile] [๐Ÿ”—View Podcast]

[Experience]

ยท Selected as an Oracle ACE (2025) โ€“ Officially recognized for contributions to the Oracle technology community
ยท Participated in various government projects, including the Ministry of the Interior and Safety's Road Name Address Information Project, the Ministry of Employment and Labor's Tomorrow Learning Card, and the Ministry of Land, Infrastructure and Transport's Construction CALS
ยท Worked as a developer, consultant, DBA, and software engineer on numerous software, data, and AI projects for companies including Samil PwC, Woori Bank, Shinhan Card, KDB Life, Samsung Fire & Marine Insurance, Korea Smart Card, Hyundai Motor Company, BMW Korea, Lotte Foods, LG MMA, and Megazone
ยท Conducted software development, data, and AI lectures, coaching, and mentoring for job seekers, the general public, and professionals through various institutions and programs such as Samsung Software Academy for Youth (SSAFY), Multicampus, Team Sparta, Code States, Fast Campus, Korea Education Group, Chwijun Company, Taling, Inflearn, and Crowdworks

[Books] [๐Ÿ”—Link]
ยท ใ€ŠDo it! Introduction to SQL with Oracleใ€‹(Easys Publishing, 2025)
ยท ใ€ŠDo it! Introduction to Database with Oracleใ€‹(Easys Publishing, 2018)
ยท ใ€ŠFreelancer Guidelines (e-book)ใ€‹(Espresso Book, 2018)
ยท ใ€ŠJSP Web Programmingใ€‹(Yemunsa, 2014)

More

Curriculum

All

51 lectures โˆ™ (29hr 4min)

Course Materials:

Lecture resources
Published: 
Last updated: 

Reviews

All

6 reviews

4.3

6 reviews

  • renee13wi1907๋‹˜์˜ ํ”„๋กœํ•„ ์ด๋ฏธ์ง€
    renee13wi1907

    Reviews 4

    โˆ™

    Average Rating 5.0

    5

    100% enrolled

    I first learned about the book, then discovered the course and decided to take it! After completing the course, it's great that I also thoroughly reviewed the book! This is my first time with SQL, and I found it easy to understand; I think it's a great course for SQL beginners!!

    • groovysunday
      Instructor

      Renee, thank you so much for your heartfelt and valuable review. I was truly deeply moved to hear that you first learned about the book and then also took the lecture. I hope the book and lecture create synergy together and are even a little helpful for your learning. As both an author and an instructor, I feel a great sense of reward. I put a lot of effort into explaining from basic concepts step by step so that those new to SQL could understand more easily and utilize it in practice. As it was the first lecture launched on Inflearn, I wondered if there might be any shortcomings, but your words that you understood it well are a great encouragement to me, who prepared the lecture. Thank you for consistently following along throughout the course and for leaving such a warm first review. If you have any questions or feel anything is lacking in your future learning process, please feel free to let me know at any time. To provide better content, I will continuously improve and supplement it. Lastly, I hope you have successfully taken the first step in SQL learning through this lecture, and I sincerely support your future growth and great performance in practice. Thank you!

  • chinchilla3650๋‹˜์˜ ํ”„๋กœํ•„ ์ด๋ฏธ์ง€
    chinchilla3650

    Reviews 2

    โˆ™

    Average Rating 5.0

    5

    100% enrolled

    I've tried learning databases and SQL multiple times but always gave up halfway through, but thanks to this course, I was able to complete it. Since the instructor is the book's author who taught directly, it connected well with the book content, and having a separate textbook made it much easier to review and keep up with the progress. It was great that all content from the beginning to the end of the book was covered, allowing me to get an overview of SQL as a whole. In particular, I think it was good that the instructor showed coding in real-time and gave separate practice time in between, making it feel like taking a real-time class even though it was online. For the most important parts in practice like SELECT statements, over 15 hours were allocated for in-depth explanations, and the instructor directly solved the 'review problems' at the end of each chapter, which was fun and helpful. Although it was a long course of over 29 hours and wasn't easy to watch completely, I don't think there's any content to skip. I recommend this to those who find it difficult to study alone and prefer having a book alongside.

    • groovysunday
      Instructor

      Jeich, thank you sincerely for completing the entire long course and leaving such a heartfelt review. Hearing that you've attempted SQL learning several times before but were able to complete this course gives me great satisfaction and joy. I'm incredibly proud as both an author and instructor that the book and lectures were connected, making it easy for you to follow the learning flow. I'm particularly glad that the practice-centered approach and review problem-solving were helpful - it seems my intended approach was well conveyed. As you mentioned, while the course is lengthy, I made every effort to include all the essential content from basics to practical application without omission. I give you a big round of applause, Jeich, for consistently following through to the end. If you have any additional questions during your learning journey, please feel free to reach out anytime. I'll always be here to support you as you continue with deeper learning and practical application. Thank you!

  • hyojay218154๋‹˜์˜ ํ”„๋กœํ•„ ์ด๋ฏธ์ง€
    hyojay218154

    Reviews 1

    โˆ™

    Average Rating 5.0

    5

    100% enrolled

    As a non-major preparing for a career change to the IT industry, I really felt the need to study SQL, and I learned about this course through a friend's recommendation. After taking the course, I understood why they recommended this book and course. It was great to be able to learn focusing on the core grammar essential for practical work, and the process of naturally learning through repeating examples and solutions was a huge help. The instructor's explanations were also Kind and easy to understand, so it wasn't difficult to follow along, and it was really meaningful to be able to feel the actual work experience. When I studied only with books, it wasn't easy to keep going consistently on my own, but like other reviews mentioned, having you display the stopwatch and give us time to solve problems made it feel like taking a real-time class even though it was an online course, which was really great๐Ÿ‘ Thanks to this, I wasn't bored throughout my studies, and even as a non-major, I was able to gradually gain confidence. I think choosing to take the course instead of just reading the book was a really good decision! Thank you for being such a great help in my job change preparation, and now I'm going to go through it thoroughly one more time :D

    • at0108428๋‹˜์˜ ํ”„๋กœํ•„ ์ด๋ฏธ์ง€
      at0108428

      Reviews 5

      โˆ™

      Average Rating 5.0

      Edited

      5

      92% enrolled

      I was a bit weak in SQL, so I was studying by purchasing various SQL books when a friend gave me a pre-revision version of a book called "Database Introduction with Oracle," which led me to find this course. I felt that this textbook was definitely more comfortable to read in terms of table of contents and flow compared to the SQL-related books I had purchased and studied before, so I thought since I'm going to study during vacation anyway, I might as well study with the revised edition. So I purchased the revised edition and am currently studying with the course... To get straight to the point, it's so good!! I'm definitely going to recommend this course first to everyone around me who says they're studying SQL. Because first of all, the textbook itself has a well-structured curriculum flow that's easy to read. For example, other SQL textbooks... In Chapter 1, they cover database theory, what relational databases are, database types, DBMS history, and all these theories, and for someone like me who lacks concentration, I get completely drained early on and end up not wanting to continue and getting exhausted. But this book just touches on the really important basic theoretical concepts at the beginning, skipping things like history, and immediately moves to hands-on practice, so the progression is speedy and good. At first, I wondered if I could listen to all the lectures because there were so many hours, but the reason for the long lecture time wasn't because it was like "pause the screen and follow along, you all followed along, right? I trust you followed along... next~" but because they actually provided separate practice time with a timer. If you subtract this timer time, the lecture time would probably be cut in half...? But providing separate practice time like this was really refreshing. In my case, I often pause the lecture midway and follow along a bit, then get distracted by other things, but since they give time with a timer without stopping the online lecture, I could focus entirely on practicing, which was great. Plus, while the practice time was actually a bit short at the beginning, later on I could follow along within that practice time, and the sense of achievement from that was really truly satisfying. Moreover, they explain really important functions used in actual work in great detail, and there are problems to solve at the end of each chapter, and they explain all of those too, which was so good..!! They could have just skipped over it since everything was already explained in the previous material, but the detail of solving each problem one by one - you can definitely tell that the author who wrote the textbook directly is giving the lectures, so I could clearly receive the content and core intentions emphasized in the book through the lectures, and I understood why the lecture time was long. And when you listen, it doesn't actually take that much longer than other lectures..! The time spent pausing lectures and getting distracted while following along with practice was reduced!! ๐Ÿ˜†๐Ÿ˜† I tend to only write reviews for lectures that really moved me... and among those, this is probably the first time I've written such a long review for a lecture ๐Ÿ˜†๐Ÿ˜† If you're like me with poor concentration and can't finish reading a book completely, you'll be able to finish it completely if you study while taking this course. I have the last 5 lectures left now, and I'll finish listening to them all today and prepare for the new semester. Fighting to all university students across the country ๐Ÿ’ช ๐Ÿ˜†๐Ÿ˜†

      • groovysunday
        Instructor

        Hello, Mingmi. Thank you so much for taking your precious time to leave such a detailed and thoughtful review. I'm truly delighted and feel a great sense of fulfillment knowing that you accurately understood the three core intentions I considered most important while creating this course: 'compressed theory in the beginning,' 'providing practice time that feels real-time,' and 'the experience of completely finishing an entire book.' I'm particularly impressed that you maintained focus and felt a sense of achievement through the practice timer. Thank you so much for consistently following along for the full 29 hours. I'm rooting for you to finish the remaining lectures well and have a successful start to the new semester! ๐Ÿ’ช

    • keulseok2597๋‹˜์˜ ํ”„๋กœํ•„ ์ด๋ฏธ์ง€
      keulseok2597

      Reviews 8

      โˆ™

      Average Rating 5.0

      5

      61% enrolled

      I am preparing for the SQLD certification exam, and this is very helpful. Thank you.

      • groovysunday
        Instructor

        Thank you so much, keulseok, for leaving such a precious review. As an instructor, I feel a great sense of reward knowing that the lectures are helping you in your process of preparing for the SQLD certification exam. SQLD is an exam where it is important to both understand concepts and develop a sense for solving problems, and I hope the lectures have been of some help in your preparation. I will sincerely root for you to successfully complete the rest of your studies and pass the exam on your first try. Thank you.

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    graphRAG - Knowledge Graph-based RAG System Implemented with Neo4J (feat. LangChain)

    pdstudio

    SELECT ALL FROM SQLCourse Thumbnail

    SELECT ALL FROM SQL

    pbj0812

    This is a basic SQL SELECT grammar lecture that starts without installing SQL.

    Beginner

    Beginner

    SQL

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    SELECT ALL FROM SQL

    pbj0812

    [2026] Yellow Book 176 Practice Problems for Those Who Find SQLD Questions DifficultCourse Thumbnail

    [2026] Yellow Book 176 Practice Problems for Those Who Find SQLD Questions Difficult

    algolearn

    SQLD Yellow Book 176 Problem-Solving Course for those who studied but can't solve problems. After completion, you'll go beyond passing to become an expert. SQLD All-in-One Pass!

    Basic

    Basic

    SQL, Big Data, Oracle

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    [2026] Yellow Book 176 Practice Problems for Those Who Find SQLD Questions Difficult

    algolearn

    CS Interview Preparation - Database Edition: Insights Directly from Channel Talk InterviewersCourse Thumbnail

    CS Interview Preparation - Database Edition: Insights Directly from Channel Talk Interviewers

    jayon0927

    Channel Talk interviewers will directly analyze the difference between failing and passing answers to the same questions, and help you prepare for actual follow-up questions.

    Basic

    Basic

    DBMS/RDBMS, NoSQL, computer-science

    CS Interview Preparation - Database Edition: Insights Directly from Channel Talk InterviewersCourse Thumbnail

    CS Interview Preparation - Database Edition: Insights Directly from Channel Talk Interviewers

    jayon0927

    Google Analytics (GA4) Certification (GAIQ) Exam Questions & Answers for Practical Use 2026Course Thumbnail

    Google Analytics (GA4) Certification (GAIQ) Exam Questions & Answers for Practical Use 2026

    GA4 Guide

    Is it enough to just search for past exam questions and pass the Google Analytics Individual Qualification (GAIQ)? A certification holds little meaning if you obtain it without knowing how GA4 is actually used in practice or how to query and utilize data. This course focuses on practical application, allowing you to directly examine reports and GA demo accounts, and even set up a demo shopping mall yourself. You will build the skills necessary for the field while solving the latest 2026 GAIQ exam questions.

    Beginner

    Beginner

    Google Analytics, Google Tag Manager, data-analysis

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    Google Analytics (GA4) Certification (GAIQ) Exam Questions & Answers for Practical Use 2026

    GA4 Guide

    3. Web Development Course [Spring Framework + e-Government Standard Framework]Course Thumbnail

    3. Web Development Course [Spring Framework + e-Government Standard Framework]

    vmproductor0202

    This is a lecture using the only domestic e-government framework and Layered Architecture, which are widely used in practice but not available in Korea. In this lecture, we will learn how to build the backend and server side of web development using the Spring Framework and the e-government standard framework.

    Beginner

    Beginner

    Spring, eGovFrame, spring-framework

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    3. Web Development Course [Spring Framework + e-Government Standard Framework]

    vmproductor0202

    Computer Science (5): Interfaces - Operating Systems, User Interfaces, DatabasesCourse Thumbnail

    Computer Science (5): Interfaces - Operating Systems, User Interfaces, Databases

    onemoresipofcoffee

    โœ… Out of the entire series (1) ~ (7), (5) operating system, user interface, database โœ… CS101 series lectures - From basic computer theory to the latest practical examples - Provides a wide range of basic knowledge

    Beginner

    Beginner

    Operating System, Linux, DBMS/RDBMS

    Computer Science (5): Interfaces - Operating Systems, User Interfaces, DatabasesCourse Thumbnail

    Computer Science (5): Interfaces - Operating Systems, User Interfaces, Databases

    onemoresipofcoffee