My first post here

I did a search but was unable to find what I want.
I have added two custom columns to calibre. One is Read, it has a check or cross, depending on if I have read it.
The other is called Good ePub, and gets a check if the ePub conversion is good.
I would like to be able to see how many books in each in the left column were Authors, Tags etc are listed.
How can I do this?
Andrew