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lwl wrote:
<<SNIP>>
I want to establish the fields at lines 11 and 16
as unique keys - for any record inserted in the file
these 2 fields must be unique to the file.
Specifically what coding is required to make this happen?
What is meant by "these two fields must be unique to the file"? Does
that meant to suggest that the combined data from both field for all
rows must have unique data; i.e. unique data across the effective
concatenation of the values in the two fields? Or perhaps the meaning
is that each column must never have a duplicate value, irrespective of
what value is in the other column? For the latter case, that would
require creation of two separate unique keys, each encapsulated in a
separate files [or constraints].
Regards, Chuck
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