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Posted by Stu on 02/18/06 22:00
Hey Chris,
Does your friend NEED to store the results of the mathematical
operation in the table, or will the value of this column always be
dependant on the other two columns? If the latter, then simply do the
calculation in the query returning data. No need to waste storage
space (or worry about validation) if the information stored is enough
to calculate your values.
Of course, Tom's suggestion about computed columns doesn't have
physical storage issues, but you have to be aware of the nature of a
computed column when doing an INSERT or UPDATE statement against the
table.
Stu
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