Datamodelleren

Universiteit Utrecht (UU)

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sql keywords: fundamentals and applications in queries
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September 2025

2025/2026
this document covers the most important keywords used in sql querys. it shows how data can be selected, filtered, organized and summarized using commands such as select, where, order by and group by. it also explains how aggregation functions such as count, sum and avg are used to gain insights from data. logical operators such as and, or and not are also discussed, as well as combining tables via join operations. together, these concepts form the core of relational database queries and provide ...
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