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2 cards from this section. Quick, good the night before a test.
What is the primary purpose of indexing in SQL?
Think about how a book's index helps you find information faster.
What command is used to analyze a query's execution plan?
Remember, we use this command to see what SQL does when executing queries.
What is the purpose of a database index?
Think about how a book index helps you find topics quickly.
True or False: A materialized view is always up-to-date with the underlying data.
Consider how cached data needs to be updated.
You are tasked with optimizing a sales table that is frequently queried for total sales by region. What strategies would you recommend?
Consider both indexing and data structure strategies.
A database system has performance issues due to a large table that is not indexed properly. What steps would you take to analyze and propose optimizations?
Pay attention to the methods available for improvement through analysis.
5 more questions in this section. Enroll free to practise them all.
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