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SQLtest.online
Task 27: 
Which SQL statement should you use to find rows that are present in both data sets?

Mark all correct answers and click the "Check!" button

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Last month I added a new MariaDB database with a preloaded University DB, 9 new questions, and refactored many questions and lessons.

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Learning SQL: Generate, Manipulate, and Retrieve Data by Alan Beaulieu
Learning SQL: Generate, Manipulate, and Retrieve Data by Alan Beaulieu
As data floods into your company, you need to put it to work right away―and SQL is the best tool for the job. With the latest edition of this introductory guide, author Alan Beaulieu helps developers get up to speed with SQL fundamentals for writing database applications, performing administrative tasks, and generating reports. You’ll find new chapters on SQL and big data, analytic functions, and working with very large databases.