In this chapter, you will discover the powerful data validation features available in Excel that help maintain the integrity of your datasets. You will learn how to set specific rules for data entry, ensuring that only valid data is input into your worksheets. We will explore various validation techniques, including dropdown lists, custom formulas, and error alerts. By the end of this chapter, you will have the skills to implement effective data validation strategies in Excel, enhancing the accuracy and reliability of your data for analysis.

Data Validation essentials

Purpose of data validation

How to do data validation in Excel

Data validation basics

Validation on dates

Formula-based validation

Reasons to validate

Re-order triggers

Data Validation in Excel

Real-life applications of Data Validation for a car company that suffers from invalid data created by its sales team. Your task is to help this company.

AutoNexa's car loan calculator

Data Validation in Excel Steps

Data validation steps

Setting limits

Validating payments

Enhancing the calculator

VIN, price,  and mileage

Maker and year

Color and condition

Course wrap-up

AutoNexa's Data Validation problem

Exercises and Datasets

Data validation is key to ensuring accuracy and consistency in Excel. The "Data Validation using Excel" course provides practical tools and techniques to streamline your workflows across inventory management, order processing, and data analysis.

You’ll start by learning the fundamentals—why validation matters, how to use the Data Validation dialog box, and how to set rules for numbers, dates, and text. You’ll also create dropdown lists for accurate data entry.

In the second chapter, you’ll apply your skills by building a product inventory system with linked rules for product codes and quantities. You’ll then create dynamic validations for order processing based on real-world scenarios.

By the end, you’ll know how to troubleshoot, document, and maintain robust validation systems—empowering you to manage data with precision and confidence.

Are you ready to take control of your data and ensure absolute accuracy in Excel? In this hands-on course, you’ll gain the expertise to validate, manage, and protect your spreadsheets with confidence.

<h2>Build a Strong Foundation in Data Validation</h2> Start by exploring the essentials of data validation in Excel. You’ll discover the importance of accurate data entry and learn how to navigate the Data Validation dialog box. From setting rules for numbers, dates, and text to crafting intuitive dropdown menus, you’ll gain practical skills that promote clean, consistent data.<br><br> <h2>Design Smart Validation Systems for Real-World Tasks</h2> Move beyond the basics by applying your skills in real-world scenarios. You’ll create a robust product inventory system using interconnected validation rules that maintain consistency across product codes and quantities. These hands-on exercises will show you how to streamline data entry while reducing human error.<br><br> <h2>Develop Dynamic Rules for Order Processing</h2> Learn to implement adaptive validation rules that respond to changing inventory levels and customer data. You’ll master advanced techniques to tailor data input restrictions and safeguard the integrity of your workflows. Plus, you'll gain troubleshooting strategies and learn how to document your systems for long-term use.<br><br> <h2>Become a Data Integrity Champion</h2> By the end of the course, you’ll be fully equipped to design and apply effective data validation strategies. Whether you're managing inventory, processing orders, or analyzing datasets, your Excel skills will ensure high-quality outcomes across all your professional tasks.<br><br>
Take the next step in mastering Excel—join us and turn your spreadsheets into reliable, error-free tools for success!



Introduction to Excel

Master Excel data validation with practical tools to ensure accurate data entry, streamline workflows, and manage inventory and orders effectively.

Learn Excel data validation to improve accuracy, create drop-downs, and manage inventory and orders with confidence.

Define clear validation rules based on business requirements.

Implement these rules using Excel’s Data Validation tools.

Test your validations by deliberately entering invalid data.

Finalize the calculator to ensure it guides users clearly and consistently.

Data validation steps

Data Validation in Excel

Interaktive Übung