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SQL Queries for Mere Mortals: A Hands-On Guide to Data Manipulation in SQL, Second Edition by Michael J. Hernandez, John L. Viescas

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Sample Statements

In this chapter, you’ve learned how to use aggregate functions in a SELECT clause and within a subquery being used as part of a comparison predicate. Now let’s look at some examples of working with aggregate functions using the tables from each of the sample databases. These examples illustrate the use of the aggregate functions as output columns and in subqueries.

We’ve also included sample result sets that would be returned by these operations and placed them immediately after the SQL syntax line. The name that appears immediately above a result set is the name we gave each query in the sample data on the companion CD you’ll find bound into the back of the book. We stored each query in the appropriate sample database (as ...

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