Write a table calc that uses PREVIOUS_VALUE to build a string of all the values.
I just helped someone do exactly that in this thread:
There is a sample workbook (V10.1) attached with a step-by-step explanation.
What version of tableau are you on?
Omkar -- Are you saying you can't open the link to Displaying all the data within a dimension in one cell ??
That's just a thread on the forum. If you can't open the link, then search for the title and get to the thread that way. The workbook attached to that thread is 10.1, so unless you're in an older version, you should be able to open it.