You found it first ⚡ 50% off any plan for 6 months, exclusive to new subscribers for a limited time only.

Join the Treehouse affiliate program and earn 25% recurring commission!

✨ Earn college credits in Cybersecurity, JS, HTML, CSS and Python

🌟 Dreaming of a bright future? 🎓 Ask about the Treehouse Scholarship program! 🚀

  • Treehouse Logo
  • Plans
    Chevron
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
  • Library
    Chevron
    • All Courses
    • Tracks
    • College Credit
  • Techdegree
    Chevron
    • Overview
    • Front End Development
    • Full Stack JavaScript
    • Data Analysis
    • UX Design
    • Python
  • Community
    Chevron
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
    • 100 Days of Code
  • Resources
    Chevron
    • Career Toolbox
    • CodeForward
    • Free Treehouse Near Me
    • Jobs
    • Blog
    • Support
    • About
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks College Credit
  • Overview Front End Web Development Full Stack JavaScript Python Development Data Analysis UX Design
  • Code Adventures Discord Forum Success Stories Treehouse Links 100 Days of Code
  • Career Toolbox CodeForward Free Treehouse Near Me Jobs Blog Support About
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • AI
      • • APIs
      • • Coding for Kids
      • • College Credit
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Game Development
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • No-Code
      • • PHP
      • • Professional Growth
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
      • • Swift
      • • Vibe Coding
  • Geovani Mejia
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    Geovani Mejia
    Front End Web Development Techdegree Student 7,940 Points

    Question on the GROUP BY keyword

    Posted October 12, 2022 7:25pm by Geovani Mejia
    .a{fill-rule:evenodd;}techdegree
    Geovani Mejia
    Front End Web Development Techdegree Student 7,940 Points
    • Databases
    • SQL Reporting by Example
    • Day 3: Getting Good at Grouping
    • Busiest Teachers

    1 Answer

  • Paul Brubaker
    Paul Brubaker
    14,290 Points

    Forgot about HAVING keyword and came up with this monstrosity.

    Posted August 26, 2019 3:37am by Paul Brubaker
    Paul Brubaker
    14,290 Points
    • Databases
    • SQL Reporting by Example
    • Day 3: Getting Good at Grouping
    • Busiest Teachers

    3 Answers

  • kevin hudson
    PLUS
    kevin hudson
    Courses Plus Student 11,987 Points

    No Help needed but want to share Code with mistakes

    Posted April 9, 2019 3:58pm by kevin hudson
    kevin hudson
    Courses Plus Student 11,987 Points
    • Databases
    • SQL Reporting by Example
    • Day 3: Getting Good at Grouping
    • Busiest Teachers

    0 Answers

  • seth aruby
    seth aruby
    10,111 Points

    Making query account for unknown PERIODS count

    Posted February 20, 2019 7:25pm by seth aruby
    seth aruby
    10,111 Points
    • Databases
    • SQL Reporting by Example
    • Day 3: Getting Good at Grouping
    • Busiest Teachers

    1 Answer

  • lukej
    lukej
    34,222 Points

    The meaning of COUNT(1)?

    Posted July 28, 2018 12:17pm by lukej
    lukej
    34,222 Points
    • Databases
    • SQL Reporting by Example
    • Day 3: Getting Good at Grouping
    • Busiest Teachers

    2 Answers

  • Ken Stone
    Ken Stone
    29,703 Points

    Alias the count

    Posted July 22, 2017 11:56pm by Ken Stone
    Ken Stone
    29,703 Points
    • Databases
    • SQL Reporting by Example
    • Day 3: Getting Good at Grouping
    • Busiest Teachers

    3 Answers

Posting to the forum is only allowed for members with active accounts.
Please sign in or sign up to post.

    Treehouse

  • About
  • Blog
  • Careers
  • Community
  • Stories
  • Shop
  • Contact
  • Gift Card

See Full Catalogue

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
  • Python Development
  • Data Analysis
  • UX Design

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
  • ...see more

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
  • ...see more

Explore

  • Plans
  • Affiliates
  • Perks
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
Terms & Conditions | Privacy

© 2025 Treehouse Island, Inc.