Making a dropdown from a selection of an enum of a column

[Justlookinghere]

Hi everyone, I'm trying to make a selection for users to select based on their selected choice from an enum of a column. This is what I would like to achieve:

I have tried to gather some info regarding this matter but most of it involves creating another table to list down the choice and make it as a key table and then the other table will be a ref table so it will create a dropdown based on the choices from the key table which is not what I wanted. Does anyone here have a workaround for this?

Thank you everyone!

[Suvrutt_Gurjar]

Your requirement is somehow not clear. In the first sentence below you have written 

"Choice 1, 2,3 are enumes"

and then you have written 

 Choice 2  (No enums)

 Choice 3  (No enums)

Could you elaborate?

[Justlookinghere]

Sorry for causing the confusion. To clarify, if a user selects Choice 1 (an enum), the user will see another set of enums of A, B, C underneath the Choice 1. If a user selects Choice 2 or 3, they wouldn't be able to see any enums afterwards which is why I wrote No enums to indicate no other enums underneath Choice 2 or 3.

[rakhie_urs]

Create a column next to your Choices 1, 2 and 3. that contains Choice 1 enum A, B and C. Show_If only when choice 1 is selected.

[Justlookinghere]

Oh this will involve regenerating the whole structure of the table then. I'm just afraid that if I were to regenerate the table with the added column, the existing data key-ed in the table will be disturbed.

[rakhie_urs]

Regenerating the table always makes your table strongly attached to your data.

If it disturbs you a little today it will become a big problem another day.

[Justlookinghere]

I agree, guess I'll have no choice but to regenerate it. Thank you very much for the input!

[Suvrutt_Gurjar]

Thank you for your more details. However, sorry, that I still did not understand the requirement.  Maybe someone else can help.

[shahappsheet]

That means list within list?

[Justlookinghere]

Yes correct

[TeeSee1]

If this is what your a looking for..

I have for en1's suggested_values

IFS(
 ISNOTBLANK([en2]),  LIST(""),
 ISBLANK([en1]), LIST("initial1","initial2"),
 ISNOTBLANK([en1]),  en1[en1]
)

for en2's

IF(
 ISNOTBLANK([en2]),  LIST(""),
 LIST("en2-initial1","en2-initial2")
)

 You can hardcode your lists or create a separate table(s) 

[Justlookinghere]

Oh this is almost similar to what I want to achieve where after pressing the initial1 in en1, it displayed AAA, BBB and CCC. 

[TeeSee1]

what is it that is different from what you are looking for?