Getting SQL Developer (SQLD) Certification Part 1

This course teaches you how to write safe and reliable code in the software development process. Rather than simply stopping at feature implementation, you'll learn programming principles and techniques that can prevent security vulnerabilities and ensure stability. Through hands-on practice and case studies, you can understand security threats that may occur in real development environments and acquire safe coding techniques such as coding rules, input validation, exception handling, and memory management to prevent them. By taking this course, developers will enhance the completeness of their code while gaining practical capabilities to develop software with security and reliability.

You can effectively study the contents of the Information Security Engineer practical exam questions and obtain the Information Security Engineer practical qualification.

You can effectively study the contents of the Information Security Engineer practical exam questions and obtain the Information Security Engineer practical qualification.

This is a basic machine learning course that briefly covers the basic machine learning theory for those who are new to machine learning.

We will explain the overall concept and method of working with 3D graphics using Blender.

Notion's powerful and convenient database features allow even beginners to easily build a DB. In this course, you will learn about database concepts and related terms (tables, rows, columns, etc.), as well as the basic usage of the Notion database.

Through this course, you can study short answer and descriptive questions from past practical exams for the Information Security Engineer.

This is a course to learn in various languages how to call various open data provided by the public data portal from various programming languages and how to use JSON data provided as a result of the call.

This is a basic C++ course for those who are new to C++ programming. You will learn and practice how to utilize C++ along with an overview of programming and the basic grammar of C++.

You can build a database, create tables, and manipulate or change data within the database using various SQL queries.

You can obtain the certification by learning and applying basic knowledge of Subject 2, Software Development, among the subjects for the Information Processing Engineer written exam.

When you want to try using Figma, a UI design authoring tool, or when you want to create something with Figma, you'll practice the most basic usage methods.

This course covers the fundamental concepts of operating systems, one of the core subjects in computer science. Operating systems are essential software for efficient resource management and providing user environments in computer systems, and through this course, learners can systematically understand how operating systems work and what components they consist of. Additionally, by learning the structures and functions of various operating systems, students will master the detailed operating principles of operating systems such as processes, memory management, file systems, and disk management, and can solidly build the foundational knowledge necessary for actual development and system utilization. Through this course, learners will gain a comprehensive understanding of operating systems and will be able to have confidence in advanced computer science learning and practical applications.

From building a database to creating tables, you can manipulate and change data within the database using various SQL queries.

In this tutorial, you will learn how to create motion effects using the Fractal, Glow, Advanced Lightning, and Expression effects in After Effects.

This course is designed to prepare you for the Information Security Engineer written exam by concisely summarizing core theories and strengthening practical skills through problem-solving. Take a step closer to obtaining your Information Security Engineer certification with past exam analysis and practical strategies.

This course is designed to help learners effectively visualize business data and develop the capability to support decision-making through visualization. Learners will study various theoretical backgrounds ranging from information visualization concepts to infographic principles, visual cognition and design principles, and Gestalt laws, and systematically acquire visualization techniques that can be applied in practice. In particular, by learning about color and visual variables, information design principles (symmetry, contrast, harmony, balance), typography and layout design (grid and inverted pyramid structure), learners will be able to apply these skills when creating actual business reports, presentation materials, and visualization dashboards. Through this, learners will develop the ability to create visual materials with high information delivery power, going beyond simple data analysis.

This is a course to learn in various languages how to call various open data provided by the public data portal from various programming languages and how to use JSON data provided as a result of the call.

In this course, you will learn how to use basic commands for 2D drawings in AutoCAD 2022.

You can effectively study the contents of the Information Security Engineer practical exam questions and obtain the Information Security Engineer practical qualification.

It contains only the essentials required to obtain the SQLD certification. This is a learning process that will help you acquire the SQLD certification by solving various examples directly, starting from setting up the development environment.

It contains only the essentials required to obtain the SQLD certification. This is a learning process that will help you acquire the SQLD certification by solving various examples directly, starting from setting up the development environment and building your skills.

"SQLD is an exam where past questions are not officially released." In preparation for the upcoming 61st exam (May 31, 2026)— Practical materials featuring 50 questions per subject and chapter, vividly reconstructed by directly recalling the latest 60th exam!

SQLD, where do I even start? A course for those who feel completely lost - you'll meet a transformed version of yourself after completing it. SQLD All-in-One Pass!

"SQLD is an exam where past questions are not released to the public." Preparing for the upcoming 60th exam (26.3.7)— Practical study material featuring 50 questions per subject and chapter, vividly reconstructed based on the actual 58th exam, which was rated as having the highest difficulty ever!

Learn how to use the most commonly and importantly used advanced T-SQL queries in practice from a SQL Server expert consultant and Microsoft MVP, so you can write SQL in a more SQL-like way.

A practical beginner course that completes SQL fundamentals in just 3 hours

SQLD, where do I even start? This course is for those who feel completely lost - you'll meet a transformed version of yourself after completing it. SQLD All-in-One Pass!

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

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

Let's understand data analysis suitable for advanced retail business and learn how to utilize tools utilized in the industry!

This is a course aimed at obtaining the nationally recognized SQLD certification, and SQLD refers to developers who can write accurate SQL for manipulating and extracting data while developing application software based on database and data modeling knowledge.