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Getting Started with the Graph Query Language (GQL)

You're reading from   Getting Started with the Graph Query Language (GQL) A complete guide to designing, querying, and managing graph databases with GQL

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Product type Paperback
Published in Aug 2025
Publisher Packt
ISBN-13 9781836204015
Length 392 pages
Edition 1st Edition
Languages
Concepts
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Authors (3):
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Ricky Sun Ricky Sun
Author Profile Icon Ricky Sun
Ricky Sun
Jason Zhang Jason Zhang
Author Profile Icon Jason Zhang
Jason Zhang
Yuri Simione Yuri Simione
Author Profile Icon Yuri Simione
Yuri Simione
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Toc

Table of Contents (17) Chapters Close

Preface 1. Evolution Towards Graph Databases 2. Key Concepts of GQL FREE CHAPTER 3. Getting Started with GQL 4. GQL Basics 5. Exploring Expressions and Operators 6. Working With GQL Functions 7. Delve into Advanced Clauses 8. Configuring Sessions 9. Graph Transactions 10. Conformance to the GQL Standard 11. Beyond GQL 12. A Case Study – Anti-Fraud 13. The Evolving Landscape of GQL 14. Glossary and Resources 15. Other Books You May Enjoy
16. Index

Aggregating values

GQL aggregation functions are provided to compute values from a set of records, offering a range of operations to handle diverse data aggregation requirements. The basic functions include COUNT, which counts the number of records; AVG, for calculating averages, MAX and MIN, for obtaining the maximum and minimum values, respectively; and SUM, for totaling the values. Advanced functions encompass COLLECT_LIST, which aggregates values into a list, and statistical functions such as STDDEV_SAMP and STDDEV_POP for sample and population standard deviation calculations. Additionally, GQL supports binary set functions such as PERCENTILE_CONT and PERCENTILE_DISC, which are used for continuous and discrete percentile calculations, respectively.

Set quantifiers: DISTINCT and ALL

Before stepping into aggregation examples, it is crucial to understand set quantifiers in GQL.

DISTINCT removes duplicates from results, while ALL (applied implicitly when DISTINCT is omitted...

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