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The first step is to always take these BS non normalized files and
normalize them. So before you even think about posting them in to your
system, split them up into multiple data files.
Instead of one customer purchage file you have two (or more). One has a
unique identifier with all the header info. The second will have the
unique identifier, maybe a line number and ONE item number. Then you can
sort that to your hearts content.
Want to verify that they all got their free batteries?
Then, who didn't get them?
Select * from OrderLine
where item='MODELA'
and (orderNbr, lineNbr) not exists
(select orderNbr, lineNbr from OrderLine where item='MODELZ')
something like that.
Rob Berendt
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