want to use a button to check if the content of A in table 1 is the same as the content in the associated table 2….

is the data in field "A" in table "1" always going to be deliminated by a paragraph mark? If not then what else could be the deliminator?

is the data in field "A" in table "2" always going to be just a single piece of data and not multiline text like in table "1"?

what is the button supposed to do after checking for similar content?

I decided to use a new view element so you can instantly see any duplicates.

As you change the data in "A" in table "1", you can see how the records in Duplicate Records change.

The code for the view element is:

let newArray := split(A, urlDecode("%0A"));
'2'[var x := A;
    count(newArray[= x]) > 0]

Line 1, creates an array of the values in A based on paragraph marks.

Lines 2&3, takes the records in the subtable '2' and compares the data in A to each value in line 1.