Practice - Evaluation of Relational Algebra Operations
Practice Questions
Test your understanding with targeted questions
What is the primary purpose of the selection operation?
💡 Hint: Think about how SQL's WHERE clause works.
What happens during projection?
💡 Hint: Consider what SELECT in SQL does.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary role of a selection operation?
💡 Hint: Think about how you would narrow down a data set in SQL.
True or False: A projection operation automatically removes duplicate rows.
💡 Hint: What happens when you use SELECT in SQL without DISTINCT?
1 more question available
Challenge Problems
Push your limits with advanced challenges
Consider a database with customer and order tables. Discuss how to select active customers who have placed orders above a certain value. Which operations would you use and in what order?
💡 Hint: Remember the logical order in query processing.
Given two unsorted tables with millions of records each, determine the best join strategy. Discuss any possible performance issues.
💡 Hint: Consider the structure and size of the tables for efficient processing.
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Reference links
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