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Learn SQL

A complete SQL course that starts from zero. You will learn how databases store data, how to ask questions with queries, and work your way up to joins, window functions, and the patterns used in real jobs.

Start with “What is SQL?”View full syllabus
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Lessons available
62
In the full course
62
  • Beginner

    Start from zero. No experience needed.

  • Intermediate

    Combine ideas to solve real problems.

  • Advanced

    The techniques used in professional work.

Course syllabus

All 62 lessons are available. Start anywhere, or follow the parts in order.

  1. Part 1 · Beginner

    SQL Fundamentals

    What SQL is, how databases are organised, and how to read data with your first queries.

  2. Part 2 · Beginner

    Working With Data

    Create tables and add, change, and remove the rows inside them.

  3. Part 3 · Beginner

    SQL Functions

    Built-in functions for counting, totals, averages, text, and dates.

  4. Part 4 · Intermediate

    SQL Aggregation

    Summarise many rows into groups and filter those groups.

  5. Part 5 · Intermediate

    SQL JOINs

    Combine rows from two or more tables into one result.

  6. Part 6 · Intermediate

    Intermediate SQL

    Queries inside queries, conditional logic, and combining result sets.

  7. Part 7 · Advanced

    Advanced SQL

    Window functions, recursive queries, and the database features used in production systems.

  8. Part 8 · Intermediate

    SQL Interview Preparation

    Questions and query challenges in the style used by technical interviews.

Keep going with SQL

SQL practiceSolve exercises by difficulty.SQL interview questionsPrepare with hints and full answers.SQL cheat sheetsQuick reference when you need it.

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