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Customer Email Domain Report

intermediate~10 min25 pts
📊 View Insights

Problem

The analytics team wants a quick view of customer email providers, alongside each customer's full name and an organisation label that's safe for display.

Schema: Customer

ColumnType
CustomerIdINTEGER (Primary Key)
FirstNameTEXT NOT NULL
LastNameTEXT NOT NULL
CompanyTEXT
CountryTEXT
EmailTEXT NOT NULL

Requirements:

  • Include only rows where Email is not NULL
  • Return three columns:
    • FullName: FirstName + space + LastName
    • EmailDomain: everything after the @ in Email
    • Org: Company; if NULL, use the string 'Individual'
  • Order by EmailDomain ascending, then FullName ascending
  • Limit to 15 rows
String FunctionsSUBSTRSTRPOSConcatenationCOALESCEIS NOT NULLORDER BYLIMITGoogle
📊
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SQL Editor

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Topfolio

Learn data analytics online. Real skills, real projects, real community.

courses

  • Career Tracks
  • Work Experience
  • Best Data Analyst Course in India
  • SQL Fundamentals
  • SQL Advanced
  • Python for Data
  • Micro Free Courses

practice

  • SQL Fundamentals Interview Test
  • SQL Advanced Coding Test
  • All Practice Tests

resources

  • How to Become a Data Analyst
  • SQL Interview Questions
  • Data Analyst Salary Guide
  • Free Datasets for Practice
  • SQL vs NoSQL Guide
  • Data Analyst vs Data Engineer vs Data Scientist

employers

  • Enterprise Screening
  • AI Proctoring Demo
  • Volume Pricing
  • Employer Portal

company

  • About
  • Terms
© 2026 Topfolio. All rights reserved.Made with ❤️ for aspiring analysts