Does anybody know of a way to open a clicked link in an existing (already open) tab?

I know you can open in the current tab, open in a new tab but in an existing tab I'm not too sure about.

I thought target="tab name" would do the job but no luck with that.

As a bit of background, I am working on my own database backend function and rather than opening new tabs all the time I would like to move to and refresh an existing tab.

Thanks in advance.