Mysql Query: Select Lastest Where Another Row With N doesn't exist?

Use the timestamp infomation to get the latest. You can order the records according to the time.

Since you have an auto increment field a_id, you can use it to find the latest entry. Timestamp calculations are slower than primary key sorting.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.