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Course manual
& Excel files

10 minutes’
hotline time

Excel expertise
28 years’


D-functions and criteria

     Duration: 60 minutes  
     Format: Interactive webinar  

If you need to total, say, the values of 50 different products, you could use 50 SUMIFS or 1 DSUM. This is the topic of D-functions (of which DSUM is one). SUMIFS has limited criteria, but the D-functions allow any. And with DGET, you can return, say, price list entries, but, unlike VLOOKUP, it warns you if the item located has a duplicate. Apply the same powerful criteria to filtering.


  • Take advantage of DSUM’s powerful criteria.
  • Discover the criteria you can create.
  • Set up robustly with Tables.
  • Apply the same criteria in the Advanced Filter.
  • Create lookups that alert you to duplicates.


At a minimum, you should be able to create basic arithmetic formulas and use the SUM function.
Applies to all Excel versions including 2013, 2010 and 2007. Any differences are pointed out.


Live webinar format

See the presentation on your PC screen and hear the presenter either from your PC speakers/headphones or on the telephone.

Type questions on the chat line during the presentation. Questions will be answered by the co-presenter.

Stay engaged with multiple-choice quizzes.

Test out the webinar technology with one of the free Excel 10-minute tips webinars.


Each webinar has a main presenter and a co-presenter, who share the presentation and question-answering. Having two makes it more engaging, and different viewpoints expressed makes it clearer.

There are a number of different AbleOwl presenters, all of whom are Excel specialists.

Excel versions

Unless specified otherwise, all webinars cover all current Excel versions from 2007 onwards. Any differences among versions are pointed out.


Webinar characteristics AbleOwl Others
Two presenters share the teaching, so one can answer queries, and the dialogue between makes the webinar more engaging. ***** *
You’re encouraged to interact with the presenters through quizzes and chat-box discussions: you’re not a passive observer. **** **
Presenters are Excel specialists, can give additional insight and answer any queries. ***** ****
Each different presenter brings his/her own personality and humour(?). **** **
You discover not only Excel parts, but also how to structure and standardise, like learning not only words, but grammar too. ***** *
You get a step-by-step PDF manual sent in advance to preview and review. ***** *
You can take advantage of expert post-webinar email support to help you get the full benefit from your new skills. ***** *
You are provided a clear and consistent learning path, without duplication, by the depth and breadth of webinar series topics. ***** ***
You can purchase multiple vouchers at considerable savings. **** **



"Great. I was able to follow really easily and it flowed along logically. Good pace. Good to have the 2 presenters i.e. who can “chat’ about what’s being done, giving 2 points of view etc."
Debbie, Financial Accountant, Hamilton, New Zealand

"I would like to send you a thank you for the clearly presented and well paced webinar I took part in yesterday. This was my first ever webinar and also my first interaction with your company and found it to be a beneficial and enjoyable experience. I look forward to my next webinar and your tips etc."
Fiona, Office Manager, Brisbane, Australia

"The rapport between Paul and Grant was great and makes it more interesting than a one way presentation."
Maureen, Accountant, Taupo, New Zealand

Cancel up to five working days before the webinar and receive a full refund. All cancellations must be notified in writing, that is, by email, fax or post. Another delegate may be substituted at any time.