Question

If I have three different tables like this

table_1

Field 1: victories
Field 2: name

table_2

Field 1: name
Field 2: birthday

Now I would want to get the birthday of the person with the most victories.

So I would do something like this (pseudo code):

select victories from table_1 and sum_it_all
get name and pass name to table_2
select birthday from table_2 where name

Ok, this is pretty ugly pseudo code, but I hope you get the point.

Using Andomar’s solution works fine.
Now I tried to nest another table in it, like this though:

select address
from table_3
where birthday = 
    (
    select  birthday
    from    table_2
    where   name = 
            (
            select  name
            from    table_1
            group by
                name
            order by
                sum(victories) desc
            limit   1
            )
    )

I do get a correct answer, but for some reason also get a null back. And how would I output the sum of victories?

Answer 1

select  birthday
from    table_2 t2
where   name = 
        (
        select  name
        from    table_1 t1
        order by
                victories desc
        limit   1
        )

If one user can have multiple rows in table_1, you’d have to sum the victories:

select  birthday
from    table_2 t2
where   name = 
        (
        select  name
        from    table_1 t1
        group by
                name
        order by
                sum(victories) desc
        limit   1
        )