I have and order DB with a portal of event tickets assigned to that order.

Once the tickets have been assigned I would like to summarize the assigned ticket numbers.

e.g.

234-255, 301, 305, 350-358

Could this be solved with a GetNthRecord custom calc or would you use a looping script.

Nice problem...

A custom function may help, too.

But I think that it will be more quick to use a script.

The result must be inserted into a text field, exactly as your example ?

yes, it goes into a text field.

A little question:

Do you want to summarize the assigned ticket numbers of all the orders in a given day ?

or

to summarize the assigned ticket numbers of a client ?

no, it is just a summary that will show up on the ticket confirmation once processsed.