I have a report with more than 50 columns.

Can I have Horizontal Scrollbar in the report?

When you generate the report it will come with a horizontal scrollbar in the browser depending on the width of the columns and depending on the squeeze settings ( ON/OFF).

Or are you asking a scrollbar in the table ??
That should also be possible using a DIV tag. I had posted a similar question some time back but for a vertical scrollbar..