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ghettocottage wrote: Tue May 26, 2020 2:41 pm

I have an external CSV file which is developed and updated periodically by a 3rd party and is access via HTML - e.g. put url "https://www.matthewproctor.com/Content/ ... tcodes.csv" into tPostcodeData.

how often is this csv file updated? where does this file live normally? who puts it on the server?

I ask, because a slightly different approach could be to have a simple script on your server that imports/updates a mysql database every night ( or more often).

then you work with the database rather than having to churn through a csv file. The server would do the heavy work for you so your app could just request a small bit of info at a time.

The file is maintained by a third party, updated periodically and lives on their server.

Thank you to all respondents, most valuable information. I have not yet tried the latest code from mrcoollion, AxWald or richmond62, however will today.

As a comment/query, I was a bit surprised at the results AxWald demonstrated - very impressive. However I would assume that with a much larger dataset (say up 1 million plus records), it would be necessary to use a database as was suggested by ghettocottage?

richmond62, yes agree that a picture is worth a thousand words, but what is a thousand words worth? Well a much smarter man than me came up with the following- A computer word is 16 bits. 2 bits (old American monetary denomination) = 1 quarter (25c). 1 bit is 12.5c. Therefore a word is worth $2, ipso facto, a picture is worth $2,000. Eugene Volokh (~1980)

Have now tested the different code snippets and they are blazingly quick - much faster than I thought. Perfect for my requirements.

Thank you for all contributions.