I saw somewhere what seemed to be nested selects, one "master" select on the "outside" and a series of selects inside- is this possible? I'm not talking about joins as there is particular relation between the selects.

I seem not to be explaining myself very well. I want to do a single query which will pull out a series of stats from various tables latest order, latest customer, largest order. Obviously I can do that with a series of selects.

The example I saw was something like

select (

 select ... from tbl_1 where ..,
 select ... from tbl_2 where ..,
 select ... from tbl_3 where ..,
 ...
)