How many problem logs are there?
select count(*) from problem_log
Of those, what is the oldest entry date used?
select log_entry_date from problem_log order by log_entry_date limit 1
Show all the problem_log information for this date!
select * from problem_log order by log_entry_date limit 1
Actually, just show the log id and problem id.
select problem_log_id, problem_id from problem_log order by log_entry_date limit 1