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Excel Tables and Formulas: SUMIF, XLOOKUP and GROUPBY (Udemy.com)

Build Excel tables and write SUMIF, date, text and XLOOKUP formulas - and stop rebuilding reports by hand

Created by: Ian Littlejohn

Last updated September 2026

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What you will learn

  • Create, format and filter Excel tables so your data answers questions instead of just sitting there
  • Aggregate table data with Sum, Count, Average, Max and Min, and filter it visually with Slicers
  • Apply conditional formatting - cell rules, Top 10 analysis, data bars, color scales and icon sets
  • Write SUMIF, SUMIFS, AVERAGEIF, AVERAGEIFS, COUNTIF and COUNTIFS to calculate on filtered data
  • Use date formulas - YEAR, MONTH, WEEKDAY, WEEKNUM, NETWORKDAYS, WORKDAY, DATEDIF and EOMONTH - for time and date intelligence
  • Repair a broken date field that Excel refuses to recognize, a problem almost every real dataset has
  • Manipulate text with LEFT, MID, RIGHT, TRIM and SUBSTITUTE, plus TEXTBEFORE and TEXTAFTER
  • Build IF logic and lookups with IF, VLOOKUP and HLOOKUP, then replace them with XLOOKUP

How it compares

Against the other 355 rated Udemy courses in Excel on CourseDuck:

  • Rating4.6 out of 5higher than 63% of them
  • Reviews3,976#76 of 356 by number of reviews
  • Length4.5 hoursshorter than 59% of them
  • Last updatedSeptember 2026more recently than 93% of them

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Course Description

This course contains the use of artificial intelligence.

Every lesson in this course is written, created and recorded by me. AI is used only to help produce supporting images and written materials around the lessons.

Which three products slipped last quarter? Which customers have not ordered in ninety days? How many working days is that invoice overdue?

Those are the questions someone asks you, and the answer is already sitting in your spreadsheet. This course is about getting it out - with tables, conditional formatting and the formulas that do the actual work.

It is the starting point of my Excel series, and it assumes nothing beyond being able to type data into a sheet.

WHAT YOU WILL BUILD

Tables

  • Create and format Excel tables, and filter text, numeric and date fields

  • Sum, Average, Count, Max and Min inside a table

  • Use Slicers to filter visually

  • Understand table syntax, so your formulas keep working when the data grows

Conditional formatting

  • Highlight according to cell rules, and run a Top 10 analysis

  • Data bars, color scales and icon sets

  • Manage rules, so the formatting does what you meant

Formulas

  • SUMIF, SUMIFS, AVERAGEIF, AVERAGEIFS, COUNTIF and COUNTIFS

  • Dates: YEAR, MONTH, DAY, WEEKDAY, WEEKNUM, WORKDAY, NETWORKDAYS, DATEDIF and EOMONTH

  • Repairing a date field Excel refuses to recognize - the ten minutes that saves the most time in this course

  • Text: LEFT, MID, RIGHT, TRIM, SUBSTITUTE, and TEXTBEFORE and TEXTAFTER

  • Logic and lookups: IF, VLOOKUP, HLOOKUP, and RANK

The new Excel functions

  • XLOOKUP, in two parts - what it does that VLOOKUP could not

  • GROUPBY and PIVOTBY - summarize data without building a PivotTable

  • VSTACK, HSTACK, TOCOL and TOROW - reshape data with a formula instead of copy and paste

HOW IT IS TAUGHT

Every section opens with an overview, then works through short lessons on real sales data. Four sections finish with a practical activity and a full worked walkthrough, so you find out whether it went in. There are 18 written articles, 22 downloadable files and role-play exercises where you work through a data project as if a colleague had asked you for it.

WHAT YOU NEED

Excel for Microsoft 365 is recommended. Most of the course runs on Excel 2016 or later. The New Functions section needs Excel for Microsoft 365 or Excel 2024, and XLOOKUP needs Excel for Microsoft 365 or Excel 2021 or later.

ABOUT THE TRAINER

I have been training business people to work with data since 2008, and publishing on Udemy since 2013. I now have 16 live courses with more than 400,000 students and more than 139,000 reviews, at an average rating of 4.6. This one is my highest rated, at 4.7.

I teach Microsoft Excel, Copilot in Excel, Microsoft Power BI, Looker Studio and Amazon QuickSight. What makes my courses different is that I teach the analysis, not just the tool - every lesson starts with a business question someone actually asks, and shows you how to answer it with software you already have.

WHAT STUDENTS ARE SAYING

  • "It is very helpful and informative."

  • "Great refresher for formulas which I had forgotten."

  • "Great class to brush up on the Excel Equations. The instructor teaches multiple ways to approach the same problem, helping create a foundational understanding for more complex equations down the line. Would highly recommend to anyone looking to upskill!"

Open the first lesson, download the sales data, and by the end of the first section you will have a table that answers questions you used to work out by hand.

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Instructor Details

Ian Littlejohn

I specialise in training business users to learn powerful methods and techniques to transform data into useful information and intelligence as well as learning strong data analysis methodology.


I completed my university degree in economics and emerged keen and eager to change the world. I spent the first half of my career working for multinational companies, on projects of various sizes, in different sectors, all revolving around analysing data of some sort and working with different software products, including Microsoft Excel.


I found that so many Excel users had a very basic understanding of how Excel works, and instead of using Excel to do the work for them, were doing all the work themselves, using old spreadsheet technology like macros instead of embracing technology like Pivot Tables. Pivot Tables were actually introduced into Excel in 1994 but many Excel users have avoided using them because they seem complicated and difficult to use.


In 2008 I decided to start my own training company and this was borne out of the passion I had to teach Excel users how to work smarter, not harder. As technology evolved, and new systems developed, I continuously expanded my training to include Power BI, Amazon QuickSight, Looker Studio, and most recently Copilot in Excel and Microsoft 365 Copilot.


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Reviews

4.6

3,976 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By Dickson Ekabe on 9/20/2026

Great Experience with Ian. He made the XL experience very simple; clear explanations and examples. Great piece for beginners and experts who need to update their knowledge.

By Vickie Suddeth on 3/18/2026

Wow! This course is already blowing me away with some of the 'easiness' to understand the topics. I appreciate the resources given and the ease of the instructor's voice and clarity.

By Theresa Sasso on 11/8/2025

I "get by" in Excel and have managed to use slicers, but this course gave me knowledge and hands-on practice with formulas that will improve my efficiency in Excel. Nicely paced and thorough demos and explanations. Thank you, Ian!

By Lisa Ely on 9/19/2024

I thought this was great overall and I learned a lot. However, some of the exercises talk about functions that are covered in later modules, so you don't yet have the knowledge to answer all the questions.

By Georjette Burton on 4/25/2023

This course was very educational from beginning to end. I like that the course is self pace. The material is provide for you at the beginning of each subject. Easy to follow and understand.

By Jerry Francia on 2/12/2021

This is an excellent course which will bring your Excel knowledge to the next level. A wide range of topics and commands are covered - very robust and real world applicable. Thanks Ian!

By Tyler Couey on 12/21/2020

Pretty great course. I was looking to defamiliarize myself with some formulas on Excel, mainly Vlookup. This course beat my expectations and provided me with a great baseline to move forward from. I would take more courses from this instructor.

By Rotich Kipkirui Amos on 11/15/2020

GREAT

By Ann Claeson on 11/15/2020

Learned a LOT of new things. Very thorough.

By Daniyal Faheem on 9/14/2020

Absolutely cleared all my doubts regarding V-Lookup !! Thank you.

By Refilwe Lekalakala on 8/14/2020

The course was a good match learning a lot in terms of using the excel sheet for reports and capturing data .

By Wendy Joosen on 8/7/2020

Easy to understand with the examples and you can do the examples together with them, so that's good.

Showing 12 of 159 reviews

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Overall Score : 92 / 100