Converting Array to Comma Separated String

I have JSON output from a Salesforce SOQL snap, in the format

[
{
“QualifiedApiName”: “Accelerator_Pack__c”
},
{
“QualifiedApiName”: “Access_Certifications__c”
},
{
“QualifiedApiName”: “Access_Requests__c”
},
{
“QualifiedApiName”: “Account_Cleansed__c”
},
{
“QualifiedApiName”: “Account_Contract_Status__c”
}
]

I am trying to convert it to a string in the format " ```
Accelerator_Pack__c, Access_Certifications__c, Access_Requests__c, Account_Cleansed__c, Account_Contract_Status__" so I can use it dynamically in the SELECT clause of another query.

I thought the .toString function would do this, but as you can see in the image of my mapper snap, it’s not making any change to the structure.

Any help would be appreciated!

I believe you want to use .join()

I bet that would work too. I got a solution from someone on Stack, I piped the QualifiedApiName into a Concat snap, then replaced the “|” with “,” in a mapper snap.