Query Run
select rev_user_text, count(distinct rev_user) from revision group by... 5 years ago
select rev_user_text, count(distinct rev_user) from revision group by rev_user_text 5 years ago
select rev_user, rev_user_text from revision limit 1 5 years ago
select rev_user, rev_user_text from revision limit 1 5 years ago
select * from revision limit 1 5 years ago