How many teams can still qualify when there are 0 teams that have secured qualification and 52 teams started?
create table table_23995075_2 (teams_that_can_still_qualify varchar, teams_that_have_secured_qualification varchar, teams_started varchar, PRIMARY KEY (teams_that_can_still_qualify))
select teams_that_can_still_qualify from table_23995075_2 where teams_that_have_secured_qualification = "0" and teams_started = "52"