Captain Jack wrote:
> Which hikes up my filtering costs later...
Which is why actual production SQL operates with outer joins instead of the
formal mathematical operations. :-)
Note that relational theory also says rows are unordered and cannot be
duplicated, neither of which is true of a practical large-scale SQL server's
data.
--
Darren New, San Diego CA, USA (PST)
I ordered stamps from Zazzle that read "Place Stamp Here".
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