SQL code copied to buffer

Task 107:

What is "Aggregation" in SQL?

Mark all correct statements about aggregation in relational databases.

Aggregation changes the level of detail (granularity) of a dataset, transforming atomic, row-level data into high-level metrics.

An aggregate is a summary statistic computed over a group of data - such as totals, averages, counts, minimums, maximums, or string concatenations.

Aggregation possible only for numbers

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

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SQL in 10 Minutes a Day by Ben Forta

SQL in 10 Minutes a Day by Ben Forta

Whether you're an application developer, database administrator, web application designer, mobile app developer, or Microsoft Office users, a good working knowledge of SQL is an important part of interacting with databases. And Sams Teach Yourself SQL in 10 Minutes offers the straightforward, practical answers you need to help you do your job.

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