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Courses/Office Productivity/MS Excel

Dealing With Duplicate Data in Excel

Master Excel's essential tools and techniques for efficiently identifying, removing, and preventing duplicate data, enhancing data integrity and boosting your productivity.

Created byDavid Ringstrom
4.7
(3 reviews)
IntermediateUpdated Oct 14, 2025
Dealing With Duplicate Data in Excel

What You'll Learn

check_circleEfficiently duplicate data and worksheets in Excel.
check_circleUtilize tools to identify and remove duplicate data.
check_circleEmploy functions like UNIQUE, COUNTIF, and SUMIF for data analysis.
check_circleApply conditional formatting to visually highlight duplicate values.
check_circleImplement data validation to prevent duplicate entries in spreadsheets.
check_circleTroubleshoot and resolve duplicate values in Excel pivot tables.

About This Course

Master the art of handling repetitive data with "Dealing With Duplicate Data in Excel." This comprehensive course equips you with the essential skills to efficiently identify, manage, and prevent duplicate entries in your spreadsheets. Say goodbye to manual sifting and endless clicks, and embrace streamlined workflows that boost your productivity and data accuracy.

You'll learn to:

  • Duplicate and Copy Efficiently: Discover quick methods for replicating worksheets, columns, rows, and cells, and master the nuances of copying versus filling dates.
  • Speed Up Formatting: Utilize the Format Painter for repetitive formatting tasks and effortlessly transfer styles between charts.
  • Identify and Remove Duplicates: Employ Excel's built-in "Remove Duplicates" feature, leverage the Advanced Filter for in-place identification, and harness the power of the modern UNIQUE function. Learn to troubleshoot and resolve duplicate values in Pivot Tables.
  • Count and Sum Data: Use COUNTIF and SUMIF functions to analyze duplicate instances and aggregate values based on specific criteria, including dynamic spilled range formulas.
  • Visualize Duplicates with Conditional Formatting: Apply dynamic rules to highlight duplicate values, allowing for quick visual identification and management.
  • Prevent Duplicate Entries: Implement data validation rules to stop duplicate data entry at the source and safeguard your worksheets with sheet protection.

Whether you're dealing with extensive datasets or simply striving for cleaner spreadsheets, this course provides practical, actionable techniques to take control of your data. Elevate your Excel proficiency and transform your data management process today!

Your Instructor

David Ringstrom
David Ringstrom

CPA, Author, Professional Excel Spreadsheet Trainer and Consultant

menu_book44 courses
star1,099 reviews

David H. Ringstrom, CPA, is the author of Microsoft 365 Excel for Dummies, and a nationally recognized instructor who has taught over 2,500 live webinars. His Excel courses are based on over 30 years of consulting and teaching experience. David’s catchphrase is “Either you work Excel, or it works you,” so he focuses on what he sees users don’t, but should know about Microsoft Excel. His goal is to empower you to use Excel more effectively. David has authored or co-authored 10 books, including Exploring Microsoft Excel's Hidden Treasures, QuickBooks Online for Dummies, and Idiot's Guide to Introductory Accounting.

Credit Information

Do these courses count toward my professional development requirements?

This portal is provided as a training and development resource for City of Markham employees. Every course is delivered by a qualified subject matter expert or learning organization, is quantifiable in hours, and is verifiable — you receive a documented certificate of completion for every course you finish, stored on LearnFormula indefinitely.

If you hold a professional designation (for example in engineering, accounting, human resources, or law), courses may be counted as professionally relevant, verifiable learning activities toward your continuing professional development. Individual practitioners are responsible for confirming that an activity meets the requirements of their professional body. For questions about the City of Markham's training and development policies, please speak with your people leader or Human Resources.

What Students Are Saying

4.7
Student's Choice
3 reviews

Frequently Asked Questions

We are a registered provider with 327+ associations and regulatory bodies worldwide. We operate across 29 global markets including Canada, the US, Australia, and the UK. Every course page clearly displays its specific accreditations. Upon completion, you receive a professional certificate that can be validated online. Our certificates include all necessary accreditation details, credit hours, and completion dates, and are formatted specifically to meet the submission requirements of most global regulatory bodies.