SQL Problem Solving for Data Analysis (Advent of SQL 2025)
Solve 25 SQL problems of varying difficulty levels. This is a commentary lecture for Advent of SQL 2025, and upon completing the course, you can finish the advent calendar and earn a badge.
119 learners
Level Intermediate
Course period Unlimited
News
4 articles
The answer to a successful data analyst portfolio lies within the 'job description.'
Learn the strategies for creating a portfolio that catches the interviewer's eye directly from a 7-year veteran analyst from RIDI!
😎 Seminar on 'How to Create a Data Analysis Portfolio That Catches the Interviewer's Eye'
• Date & Time: 5/19(Tue) 7:30 PM ~ 9:30 PM
• Location: ZOOM Online
📌 Recommended for these people
Job seekers who are curious about how to prepare a portfolio to get a job as a data analyst
Career changers who are worried about not having any data analysis projects.
Those who are struggling with how to revise their applications after repeatedly failing the document screening stage
Anyone who is curious about data analysis portfolios
If you have friends or acquaintances who might need this seminar information, please share the news with them.


Hello, Datarian has prepared an appreciation event to celebrate its 5th anniversary.
At the SQL Data Analysis Camp, where you can learn the most commonly used data analysis frameworks in practice through SQL, you can enroll at a 50% discount if you apply now.
If you've been thinking that you can no longer put off applying data analysis to your work!
Enroll now and learn directly from data analysts who have worked at Coupang, Ridi, and JobPlanet.
Go to SQL Data Analysis Camp (50% discount, until midnight tonight)
SQL Data Analysis Camp | After taking this package, you will be transformed like this
✔ Why did our company's sales drop? You can analyze it yourself using SQL.
✔ You can perform RFM customer segmentation analysis by identifying customers who have made large or frequent purchases in our service.
✔ You can perform funnel analysis to see how users entered through marketing and what purchase conversions were made.
✔ You can obtain and check user retention rate data through retention analysis.

Hello, Datarian has prepared an appreciation event to celebrate its 5th anniversary.
At the SQL Data Analysis Camp, where you can learn the most commonly used data analysis frameworks in practice through SQL, you can enroll at a 50% discount if you apply now.
If you've felt that you can no longer put off applying data analysis to your work!
Sign up now and learn directly from data analysts who have worked at Coupang, Ridi, and JobPlanet.
Go to SQL Data Analysis Camp (50% discount, ~4/30)
SQL Data Analysis Camp | After taking this package, you will be transformed like this
✔ Why did our company's sales drop? You can analyze it yourself using SQL.
✔ You can perform RFM customer segmentation analysis by identifying customers who have purchased a lot or frequently from our service.
✔ You can perform funnel analysis to see how users entered through marketing and what purchase conversions were made.
✔ You can obtain and check user retention rate data through retention analysis.

I need to build a portfolio, but where on earth can I get actual user data?
For those who have heard that you can collect and analyze user data yourself in GA4, but are getting stuck right from the installation stage,
We have prepared a free hands-on seminar where you can personally go from 'GA4 installation to data verification' in just 2 hours.
✔ Possible to install GA4 without development knowledge
✔ Configure a data collection environment with just a few clicks
✔ Check data after connecting to Tistory
📅 4/14 (Tue) 7 PM - 9 PM, ZOOM Online
If you have any friends or acquaintances who might need this seminar, please share the news with them :)



