Hi,
I was wondering what would be the optimal way to select 1 matching row
from multiple tables. Here is the scenario.
Multiple tables contain a primary key KEY. If Table1 contains a
matching KEY, then I want that row from Table1. Only if it isn't in
Table1, then look in Table2 if it is there. If not in Table2 go on to
Table3, etc etc.
Is there a way to do this using SQL, or should I just break this up into
multiple queries and have the logic in C - this is for an embedded
system, so I want to use the least amount of memory & CPU (memory is
more important though).
Thanks
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