Source contains field with List which contains Records -> Find specific entry

[Anonymous]

Hello,

I have a data source (Databricks) where one fields is returned as a list which contains various records.  I know that I can explode the list and then explode the records to get different columns but I would like to avoid this.

My interest is to verify the existence of specific values within the records itself and define some flag.

As an example, my data source return something like this:

Employee #	Details
1	List
2	List

When I expand "Details", I get various "records" which then are represented with the following fields: Address, City, State, Country

At the end, I would like to simply get a calculated column such as "IsCountryUSA" = True | False if one of the records that belongs to the employee is equals to United States (an employee could have more than one adress).

Is there any way to create a calculated column in PowerQuery without actually exploding everything?

Thank you

[Mariusz · Accepted solution]

Hi @Anonymous 

Try this code or please see the attached.

let
    Source = #table( type table [Employee = number, Details = list], 
        {
            {
                1, 
                { 
                    [Address="", City="", State="", Country="USA"], 
                    [Address="", City="", State="", Country="UK"] 
                }
            },
            {
                2, 
                { 
                    [Address="", City="", State="", Country="Poland"], 
                    [Address="", City="", State="", Country="UK"] 
                }
            } 
        } 
    ),
    #"Added Custom" = Table.AddColumn(Source, "IsCountryUSA", each List.Contains( Table.FromRecords( [Details] )[Country], "USA" ), type logical )
in
    #"Added Custom"

Best Regards,
Mariusz

If this post helps, then please consider Accepting it as the solution.

Please feel free to connect with me.
LinkedIn

[Anonymous]

Wow, thanks folks, it works great!

[Anonymous]

Hi, 

You can use these functions to achieve this. 

Table.AddColumn(#"Added Custom", "IsCountryUSA", each List.Contains(Table.Column([Details], "Country"), "USA"))

Let me know if you need any more help!

[amitchandak]

@Anonymous , refer to if these functions can help

https://docs.microsoft.com/en-us/powerquery-m/list-functions