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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.

(5.0) 2 reviews

119 learners

Level Intermediate

Course period Unlimited

SQL
SQL
MySQL
MySQL
PostgreSQL
PostgreSQL
SQLite
SQLite
SQL
SQL
MySQL
MySQL
PostgreSQL
PostgreSQL
SQLite
SQLite
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News

4 articles

  • datarian님의 프로필 이미지

    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

    👉 Sign up for the seminar

     

    📌 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.

     

    26년 4월 세미나 홍보.png.webp26년 4월 세미나 홍보-1.png.webp
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  • datarian님의 프로필 이미지

    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)

    👉https://dub.sh/WTOM6L5

     

    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.

     

    SQL 이벤트 카드 - 1 (1).png.webp

     

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  • datarian님의 프로필 이미지

    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)

    👉https://dub.sh/WTOM6L5

     

    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.

     

    SQL 이벤트 카드 - 1.png.webp
    0
  • datarian님의 프로필 이미지

    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

    👉Register for the seminar

     

    If you have any friends or acquaintances who might need this seminar, please share the news with them :)

     

    25년 7월 세미나 홍보.png.webp25년 7월 세미나 홍보-1.png.webp
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Free