How to copy duplicated data and transfer next to first data placed

I have a spreadsheet with nearly 200,000 details on it... some are duplicated, some are not duplicated. The data is set into months and I'm trying to find out how many times they have shown up through the 12 months in the spreadsheet.

I know how to highlight duplicated cells to see which are duplicated.

I just want to find an easier way of going through the duplicated ones, copying the data then pasting it next to the first order made. My goal is too find out how many times they are duplicated and also see when the duplicated orders where made.

I don't know If this makes any sense, or If there is a way of doing this, But any help would be massively grateful!

Thanks,

Tom

Your post does not comply with Rule 1 of our Forum RULES. Your post title should accurately and concisely describe your problem, not your anticipated solution.

Use terms appropriate to a Google search. Poor thread titles, like Please Help, Urgent, Need Help, Formula Problem, Code Problem, and Need Advice will be addressed according to the OP's experience in the forum: If you have less than 10 posts, expect (and respond to) a request to change your thread title. If you have 10 or more posts, expect your post to be locked, so you can start a new thread with an appropriate title.

To change a Title go to your first post, click EDIT then Go Advanced and change your title, if 2 days have passed ask a moderator to do it for you.

(This thread should receive no further responses until this moderation request is fulfilled, as per Forum Rule 7)