Abstract
Aggregate functions are used to perform a calculation on one or more values, and the result is a single value. If your query has any columns with nonwindowed aggregate functions, then a GROUP BY clause is required for the query.
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© 2015 Jason Brimhall, Jonathan Gennick, and Wayne Sheffield
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Brimhall, J., Gennick, J., Sheffield, W. (2015). Chapter 5: Aggregations and Grouping. In: SQL Server T-SQL Recipes. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-0061-2_5
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DOI: https://doi.org/10.1007/978-1-4842-0061-2_5
Publisher Name: Apress, Berkeley, CA
Print ISBN: 978-1-4842-0062-9
Online ISBN: 978-1-4842-0061-2
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