🗄️ Category

Databases

Learn SQL, the language for asking questions of data, using a real database that runs in your browser.

3 courses

SQL3

Databases · SQL

Learn SQL from zero on a real database that runs in your browser: read, filter, sort and summarise data, then add and change it.

Not started

Databases · SQL

Combine tables with joins, nest queries, use functions and CASE, and design tables with keys and constraints.

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Databases · SQL

Write readable multi-step queries with CTEs, rank and compare rows with window functions, and learn how indexes, views and transactions work.

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