The new Column comparison in queries in Dynamics 365 / PowerApps


Column Comparison is one of the best features that has been recently added to the product.

Column comparison allows us to compare values of 2 different columns in our query be it Fetch XML, Web API, or through SDK API.

Sharing some of the basic examples that we tried using our favorite  FetchXML Builder

  • If we run the following query “Find all contact which has the first name equal to the last name”

The result –

  • Find all contact where the first name is not equal to last name

The result –

The operators supported are –

Equal LessEqual GreaterEqual
Not Equal LessThan GreaterThan
  • Only 2 columns can be compared.
  • Only compatible attribute types can be compared.
  • E.g. “Find all contact where the first name is equal to address 1 city”

The result

It works as both are string attributes.

  • If we try comparing text field with options set, we will get below error message

  • Two option set can be compared as they represent the same type integer

Both having value 1

  • Comparing date fields

  • We are getting the result

  • For the lookups, comparing created by and owner id

works as expected.

  • For the below record we have the First name and job title as null

And here for below record, we have the same value for First Name and Job title.

On running the below query – find all contact where the first name is equal to the job title.

We get only one result. It ignored the blank (null) record.

Get all the details here

https://docs.microsoft.com/en-us/powerapps/developer/common-data-service/column-comparison

Hope it helps..

Author: Nishant Rana

I love working in and sharing everything about Microsoft.NET technology !

18 thoughts on “The new Column comparison in queries in Dynamics 365 / PowerApps”

  1. Awesome post Nishant. Quick one what about Option set to option set comparison? Will that work? Does the optionset number has to match or can just the labels match?

    I’m assuming it’ll only work if the two optionsets have the same integer value against the options.

    Liked by 1 person

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