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system-design-101/data/guides/how-do-sql-joins-work.md
Kamran Ahmed ee4b7305a2 Adds ByteByteGo guides and links (#106)
This PR adds all the guides from [Visual
Guides](https://bytebytego.com/guides/) section on bytebytego to the
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- [x] Markdown files for guides and categories are placed inside
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- [x] Guide links in readme are auto-generated using
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2025-03-31 22:16:44 -07:00

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How do SQL Joins Work? Learn how SQL joins work with detailed explanations and examples. https://assets.bytebytego.com/diagrams/0367-top-4-types-of-sql-joins.png 2024-03-11 false
technical-interviews
SQL
Database

The diagram above shows how 4 types of SQL joins work in detail.

INNER JOIN

Returns matching rows in both tables.

LEFT JOIN

Returns all records from the left table, and the matching records from the right table.

RIGHT JOIN

Returns all records from the right table, and the matching records from the left table.

FULL OUTER JOIN

Returns all records where there is a match in either left or right table.