How to create a fixed table size, but with dynamic no. of columns?

Hello,

Is it possible to have a fixed table size e.g. 1000px, with the 1st column (Header & Labels) and the last column (Total) fixed and then I have the scrollable area of the table in between, but, instead of having 3-4 columns as in the examples provided on this website, I have 10, 15, 20, 30 or more columns without affecting the size of the table? i.e. irrespective of the no. of columns, the scrollable area doesn't stretch the table size to the right.

Thanks in advance.

Best regards,
Yogesh.