Complete practical skills from Excel dashboards to SQL and BigQuery data analysis

Learn how to automate repetitive Excel data-cleaning tasks in the workplace using Power Query. Transform a “visually appealing table” filled with horizontally arranged dates and merged cells into a database-style structure suitable for analysis, and complete an interactive dashboard that updates with a single click.

An introductory course on easily organizing and analyzing marketing data with Excel! Learn through hands-on practice, including PivotTables, functions, and practical problem-solving, to acquire data analysis skills that can be immediately applied in real-world work.

How is processing big data different from processing data with Pandas? Let's learn about Spark, an essential framework for big data processing.

Starting from installing MariaDB and understanding its structure, you will learn step-by-step from writing SQL queries and utilizing functions to joins and subqueries. You will master core practical features such as table design, performance management, backup, and recovery through hands-on practice, completing the practical skills necessary for database development and operation.

The [Customized Basic Python for Data Analysis] course that even non-majors have easily completed! Learn the basics of using ChatGPT alongside it to create a "starting point" for data analysis and AI utilization. From essential prerequisites for data analysis to customized learning from a "Data Analysis Instructor," you can build deep foundational skills while learning quickly. This course instills the courage and confidence needed for coding and provides a roadmap for your future data analysis studies.

Through detailed lectures and hands-on practice on the core elements of SQL, we will provide you with a solid foundation to grow into a SQL analysis expert.

We will solve 88 practice questions for the Tableau Desktop Foundations (formerly Tableau Desktop Specialist) certification. We will practice directly using the Tableau program.

Data is piling up, but are you feeling lost about who to target? Find your key customers through data summarization and design the optimal targeting logic.

With the advent of the AI era, building data pipelines has become a core competency that determines a company's competitiveness. Learn how to build efficient data pipelines using Airflow, the most widely used tool, directly from a Silicon Valley expert (formerly Head of the Data Team at Udemy, currently a professor in the Data Masters program at San Jose State University) with practical experience and extensive lecturing experience.

This is a special lecture that can lay the theoretical foundation to simultaneously prepare for the Microsoft AZ-900 certification, and as the latest content reflecting the scope of questions as of May 2025, by providing content related to core data concepts, Azure's relational data, Azure's non-relational data, and Azure's analytical workloads in a form combining theory and practice, it can be utilized as a meaningful educational opportunity to not only obtain the certification but also take the first step towards becoming a data professional.

A DBA instructor with 30 years of experience teaches 45 essential SQL tuning techniques that can be immediately applied in practice through real-world examples. Master the practical know-how to make slow queries 10 times faster, from execution plan analysis to index optimization and join tuning!

In this course, you can learn a wide range of topics, from basic Excel functions to advanced formulas, data visualization, and dashboard creation, with a focus on hands-on practice. By providing templates and solution files, self-study is possible, and you can maximize work efficiency by mastering data analysis skills that can be immediately applied in real-world scenarios.

A course where anyone—from general users unfamiliar with programming to office workers looking to simplify their tasks—can learn how to create data processing rules, merge multiple documents, and easily automate workflows with just a few mouse clicks!

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.

This course aims to obtain the state-certified SQLD (SQL Developer) certification. An SQLD refers to a developer who can write accurate SQL to manipulate and extract data while developing application software based on knowledge of databases and data modeling.

"SQLD is an exam where past questions are not officially released." Preparing for the upcoming 60th exam (2026.3.7)— Practical study material featuring 50 vividly reconstructed questions by subject and chapter, based on the latest 59th exam!

Learn how to automate repetitive Excel data-cleaning tasks in the workplace using Power Query. Transform a “visually appealing table” filled with horizontally arranged dates and merged cells into a database-style structure suitable for analysis, and complete an interactive dashboard that updates with a single click.

Data Analysis that Determines Online MD Performance! Learn essential data analysis and strategy formulation techniques necessary for MDs to maximize sales and profit in the e-commerce market.

Put an end to daunting data analysis with ‘Exploratory Visualization’! Drastically increase the speed of practical analysis without difficult coding.

Criteria for organizing complex data at a glance: Cognitive-based practical visualization designed with Excel and AI.

Here’s an example of the synergy that can be created when combining Tableau Desktop and Server/Online. Let’s build a pipeline together to see how data can lead to concrete actions!

Analyzing customers, markets, and revenue patterns—you no longer need to learn it yourself. Just ask AI, and expert-level analysis and strategies are completed in an instant!