How to write this kind of a query in mysql5?

By adding the typeId and groupId checks in the where clause, you are effectively making your left join into an inner join, by requiring all rows have values in this joined table. However, this is not the case here. If you move the type and group checks to the on clause (in the join), you should get the desired result.

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.