Explore over 500 frequently asked SQL terms, query techniques, and database concepts. Every entry includes a short definition, real example, and why it matters - so you can query with confidence.
Learn about hundreds of common SQL definitions with our glossary below!
The SQL glossary is a curated list of common SQL terms, functions, clauses, and query examples put together by the Galaxy team! It helps users understand key database concepts and how to apply them in real-world queries.
Learning SQL terminology helps you write better queries, debug errors faster, and communicate more effectively with data teams. Whether you're preparing for a data role or optimizing production systems, clear understanding of SQL concepts is critical.
This glossary is built for data analysts, engineers, marketers, and students who want to strengthen their SQL skills. It’s ideal for beginners and experienced professionals alike.
Yes! The Galaxy glossary includes real query examples and explains how each term is used in context—making it a powerful resource for technical interview prep.
Unlike static lists, the Galaxy glossary is continuously updated by real engineers and built into our SQL workspace—complete with working examples, definitions, and links to related topics.
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