[2026] SQLD All-in-One: Pass in One Go, Even for Non-Majors

SQLD, where should I start? For those of you feeling completely overwhelmed, this is the lecture for you. You will meet a transformed version of yourself after completing the course. SQLD All-in-One Pass!

(4.8) 68 reviews

519 learners

Level Beginner

Course period Unlimited

SQL
SQL
Big Data
Big Data
Data Engineering
Data Engineering
SQLD
SQLD
Coding Test
Coding Test
SQL
SQL
Big Data
Big Data
Data Engineering
Data Engineering
SQLD
SQLD
Coding Test
Coding Test

Reviews from Early Learners

4.8

5.0

parkjh980226

87% enrolled

As a non-major, I passed in just two weeks. I was crying while working through the "Yellow Book" and ended up throwing it aside halfway through, but I think having solved at least some of it helped me barely pass this difficult exam.

5.0

ibvictory

92% enrolled

I am a non-major and passed with exactly 60 points after studying for one week. To be honest, I was too lazy to even finish one full round of past exam questions, but looking back, I think I passed thanks to these lectures. If you solve the "Yellow Book" (SQLD practice guide) while watching this lecture, it will be so difficult that you might lose your mind. For those whose priority is just passing the exam, I think it's better to solve all the past questions here and in other theory books first, and then only move on to the Yellow Book if you have time left. While it was good for catching concepts I missed, the Yellow Book is much harder than the actual exam difficulty... I think it would be great if there were more explanations connecting confusing concepts, especially for problems where the examiner is clearly trying to trick you, like those involving "Null."

5.0

yun9699

100% enrolled

I recently took this course and passed the SQLD exam. I am a non-major with a liberal arts background. Although I had only briefly handled MariaDB databases before (for reference, the exam is based on MSSQL and Oracle), I believe that even those with no basic database knowledge will be able to understand it sufficiently after taking this course. After completing this course, I solved the Yellow Book from beginning to end (you must take the course first to properly understand the content of the Yellow Book!), and thanks to that, I was able to pass the SQLD certification without difficulty. It was an easy-to-understand course even for non-majors, and in the lecture, after explaining concepts, they immediately solved example problems together, which led to much better understanding than simply listening to theory alone, and was very helpful for actual problem-solving.

What you will gain after the course

  • Understanding Data Modeling - Entities, Attributes, Relationships, Identifiers

  • Data Models and SQL - Normalization, Relationships and Joins, Transactions, Null Attributes, Identifiers

  • Database Modeling Practice Using ERwin

  • SQL Basics and Application: Query Structure and Practice

  • SQL Basics - SELECT, Functions, WHERE, GROUP BY, HAVING, ORDER BY, Joins and Standard Joins

  • SQL Utilization - Subqueries, Set Operators, Group and Window Functions, Hierarchical Queries, Pivot and Unpivot, Regular Expressions

  • Database Management Syntax - DDL, DML, DCL, TCL

2026, perfectly tailored for the revised exam!

This is the SQLD All in One course that allows even non-majors with zero background to pass all at once.

SQLD All in One

This course is perfectly tailored for the revised 2026 exam. It provides a quick and easy path to obtaining your SQLD certification.


The SQLD certification is a nationally recognized certification that verifies professional knowledge for deeply understanding the core principles of SQL and skillfully applying them in practice. This course is designed to help even beginners learn effectively, systematically covering everything from essential core theories for passing to actual exam problem solving and hands-on practice.

Why you should choose this course:

  • Free SQLD Textbook Provided: Free study material including detailed explanations and practice problems (Based on Oracle RDBMS)

  • Harmony of Theory and Practice: Practical skill improvement combining SQL theory + query writing practice (Oracle + DBeaver & MS SQL)

  • Practical problem solving and mock exams provided: Perfect preparation for passing the exam!


The SQLD certification is the first step toward growing as a data and big data-based professional. Mastering SQL will allow you to enhance not only your data analysis skills but also your data engineering capabilities.


Take on the challenge right now! 🚀

Do you need a paper book?

SQLD is Easier Than You Think has been published.

sqld-book-cover-blog-480

You can purchase this book <here>.

Algo App Banner- 복사본 (1)

Click the image. You can download the app.

Scan the QR code and try solving problems on the mobile app.

If you verify your lecture review, you will receive a 100% free coupon.

Experience an unrestricted mobile environment. Solve plenty of problems to ensure your success.

Algo App Banner- 복사본 (4)

Clicking the image will also take you to the page. Verify your review and receive a free mobile app coupon.

Choosing this means passing! SQLD All-in-One Pass Choose this course.

Part 1. Data Modeling

Part 2. SQL Fundamentals and Application

Practice problem solving for the "Yellow Book"

The lectures have these features!

Slide 960 Px-6

Textbooks with thorough explanations

We provide textbooks with thorough explanations, rather than just summarized PowerPoint slides.

SQLD Modeling Practice

ERDs appearing in SQLD! They are directly linked to understanding SQL. You can improve your understanding through modeling practice.

Includes the latest SQLD exam scope

A textbook that reflects the entire latest exam scope. Provided with thorough explanations.

SQL query writing practice

ERDs appear in SQLD! They are directly linked to understanding SQL. You can improve your understanding through modeling practice.

Summarized at a glance, easy to remember! Mind map provided

Neatly organize what you have learned so far and take your skills to the next level!

Practice questions by item and chapter, plus past exam solutions provided

Certification exams are all about the problems🚀 Organize what you've learned by solving the problems included in the textbook.

  • Provides core lectures and textbooks with detailed explanations that even SQL beginners can fully understand and learn

  • SQL Practice Environment Setup Guide and Practice Session

  • Provides theoretical problems by item and chapter to help organize what you have learned while solving problems

  • The shortcut to passing! Providing practical past exam question lectures and materials

  • Provides mind maps to organize at a glance and remember easily

Learning Content

  • You can understand the relationship between data models and SQL.

  • Learn data modeling using ERWin and create one yourself.

  • Learn basic SQL theory and practice writing queries using Oracle.

  • Learn advanced SQL and management syntax and write queries yourself.

  • Solve past exam questions and mock exams, and summarize the core content.

1. Understanding Data Models

SQLD Part1 > Chapter1

Understanding data models, entities, attributes, and relationship identifiers

  • Essential content for improving SQL understanding

  • Provides thorough explanations and concept review questions

2. Data Model and SQL

SQLD Part1 > Chapter2

Normalization, Relationships & Joins, Models and Transactions, Null Attributes, Identifiers

  • Advanced lecture on understanding data models and conceptual review problems

  • Acquiring data modeling skills through hands-on practice

3. SQL Basics

SQLD Part2 > Chapter1

SQL Basic Theory and Query Writing Practice

  • Relational Database Basics

  • Syntax including SELECT, WHERE, GROUP BY, JOIN, etc.

4. SQL Application

SQLD Part2 > Chapter2

Advanced SQL Utilization Query Theory and Writing Practice

  • Subqueries, Sets, Group and Window Functions, TOP-N

  • Hierarchical Queries, Pivot & UnPivot, Regular Expressions

5. Management Syntax

SQLD Part2 > Chapter3

RDBMS Management Syntax Theory and Practice

  • DML, TCL, DDL, DCL

  • DML and Transactions

  • Database Object Privilege Management

6. Past Exams, Practice Problems, and Key Summaries

Review and organize the learning content with past exam questions, practice problems, and mind maps.

  • Solving Core Previous Exam Questions

  • Mind Map Summary

  • 3 sets of practical mock exams provided

The person who created this course

I started my career in the data field in the early 2000s. I first began with tasks extracting and loading data using SQL. Back then, watching the seniors who did modeling, I promised myself, 'I should become a modeler later, too.'

Through long-term experience and study in the field of data, I have not only become a data modeler but also a big data analysis expert by developing my data analysis capabilities.

I have created lectures based on my experiences for those who wish to grow into data experts. By taking this course, you will be able to go beyond just obtaining certifications and develop practical skills for the field.

I wish all the students constant happiness.

  • Adjunct Professor of Big Data AI MBA (Current)

  • CEO of an IT startup

  • Working for a major IT services corporation (Data Expert)

  • Published numerous Big Data textbooks (Big Data Analysis Engineer written exam, practical exam, etc.)

  • Professional Engineer Information Management


Notes before taking the course

  • The SQL practice environment uses Oracle.

  • The copyright of the learning materials belongs to Data Code Lab. Unauthorized distribution is prohibited.

Practice Environment

  • Operating System and Version (OS): Windows, Mac

  • Tools used: Oracle 12C & DBeaver, LiveSQL

  • PC Specifications: No restrictions

Learning Materials

  • SQLD self-developed textbook (pdf), practice data & scripts, past exam solutions (pdf), mind map (html), and actual mock exam questions provided

  • Self-developed textbook: Composed of theoretical explanations, itemized review questions, chapter review questions, and practice mock exam questions

Prerequisite Knowledge and Important Notes

  • Beginners in SQL can learn.

  • Proceed with problems and practice after taking the lecture, and repeatedly familiarize yourself with the lecture and textbook content.


  • SQLD Part 1, Yellow Book problem-solving lectures are provided separately

  • The copyright of the lecture materials belongs to DataCodeLab. Unauthorized distribution is prohibited.

Recommended for
these people

Who is this course right for?

  • Those who want to build their credentials with an SQLD certification

  • Those who want to improve their development capabilities by obtaining the SQLD certification in one go.

  • Those who intend to pursue a career as a data scientist with an SQLD certification

  • Those who need both SQLD books and lectures

  • Those who want to build foundational skills for the changing world of data

Hello
This is algolearn

Career Verified

1,230

Learners

132

Reviews

92

Answers

4.7

Rating

6

Courses

I love studying and sharing knowledge. I have extensive experience in big data and artificial intelligence.

  • 20 years of experience as a data analyst and 5 years of teaching data analysis!

  • Consulting and lecturing for corporations and public institutions in the fields of Big Data and AI

  • Author of "Big Data Analysis Engineer All-in-One" (Written and Practical Exams)

  • CEO of an AI startup

More

Curriculum

All

65 lectures ∙ (13hr 5min)

Course Materials:

Lecture resources
Published: 
Last updated: 

Reviews

All

68 reviews

4.8

68 reviews

  • dngus8032016님의 프로필 이미지
    dngus8032016

    Reviews 1

    Average Rating 5.0

    Edited

    5

    78% enrolled

    As a non-major, I heard from those around me that SQLD is a must for studying data, so I looked for a course that includes hands-on practice and ended up enrolling. Compared to other courses, it's very clean and offers plenty of practice problems, which is great. I really want to pass the SQLD certification!

    • algolearn
      Instructor

      Hello. Thank you for the kind review. I hope for a great result. I'll be rooting for you. :)

  • sagal57706님의 프로필 이미지
    sagal57706

    Reviews 4

    Average Rating 5.0

    Edited

    5

    18% enrolled

    I'm taking on the challenge with August 22nd as my goal. Fighting!

    • algolearn
      Instructor

      Thank you. I hope you pass in August. I've prepared a few materials to support you. I'll release them soon. :)

  • kamio님의 프로필 이미지
    kamio

    Reviews 2

    Average Rating 5.0

    5

    25% enrolled

    It's great because I can learn the concepts and practice solving problems in a short amount of time.

    • algolearn
      Instructor

      Hello. Thank you for the kind review. I hope for a great result. I'll be rooting for you. :)

  • you81065368님의 프로필 이미지
    you81065368

    Reviews 2

    Average Rating 5.0

    5

    100% enrolled

    It is good for learning the basics.

    • algolearn
      Instructor

      Hello. Thank you for leaving a great rating and review. I hope the lecture was helpful. I'll be rooting for you. :)

  • parkjh9802263273님의 프로필 이미지
    parkjh9802263273

    Reviews 5

    Average Rating 5.0

    5

    87% enrolled

    As a non-major, I passed in just two weeks. I was crying while working through the "Yellow Book" and ended up throwing it aside halfway through, but I think having solved at least some of it helped me barely pass this difficult exam.

    • algolearn
      Instructor

      Congratulations. It's amazing that you passed after studying for only two weeks. :) Thank you even more for taking the time to come back and leave a review. ^^

algolearn's other courses

Check out other courses by the instructor!

Similar courses

Explore other courses in the same field!