I am aware of the capabilities of using SQL, but feel that it is overkill for this application.

I will have, at most, 48 pressure values per day to look up; these will be read from a .csv format file. I could, I agree, use DBI (I think DBD::CSV would be most appropriate) but I can't help thinking that the performance overhead will be too much.

I suppose I could always just try it, i.e. profile rather than speculating.

I'll wait to see if there are any other suggestions then knock something up tomorrow.

Cheers,

R.

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Robin Bowes | http://robinbowes.com