Search for matches from columns on separate sheets.

Hello,

I've got a problem that is stumping me, and I hope you all can help. I have two sheets in my workbook and I would like to have a formula, script, or macro that would check A1 of sheet 1 for a matching value in Column A of sheet 2. If a match is found, and there may be multiple, display all rows of data with that match. Once A1 has been checked, check A2, and so on for all of Column A of sheet 1.

I hope that made sense, and thank you all in advance if you help me out.