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4 cards from this section. Quick, good the night before a test.
What is Spark SQL?
Think about how SQL functions in databases.
Name one benefit of using DataFrames in Spark SQL.
Consider how databases use tables.
What type of data processing does Spark SQL primarily focus on?
Recall the difference between structured and unstructured data.
Spark SQL integrates with which data formats?
Think about different file types used in databases.
Given a sales database with columns for item, revenue, and region, write a SQL query to find the total revenue per region.
Remember to use GROUP BY for aggregate functions.
Discuss potential performance bottlenecks in Spark SQL applications and suggest optimization strategies.
Think about how resource management can affect performance.
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