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Searching very large files
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Robert Green
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January 1, 2022 - 5:45 am
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Hi there Philip and Mynda - Happy New Year!

I have downloaded the UK PAF (Postcode Address File) with 29million rows split into 6 separate files and want to use it to look up several thousand postcodes I have in another workbook and return the street address. If the PAF was (a lot) smaller I would just use XLOOKUP, so what tools do I need in order to achieve this?

Many thanks

Robert

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Mynda Treacy
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January 1, 2022 - 10:25 am
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Hi Robert,

I would put all 29 million rows in a single CSV file. Use Power Query to get the CSV file and do the lookup in Power Query using Merge Tables.

Mynda

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Robert Green
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January 2, 2022 - 12:07 am
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Thank you, Mynda. I'll give that a try.

All best wishes to you, Philip and your great team.

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Mynda Treacy
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January 2, 2022 - 11:26 am
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Thanks, Robert! And you to 🙂

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Robert Green
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January 12, 2022 - 4:35 am
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Just to confirm that answer regarding the 29 million rows worked a treat. Thanks again.

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Mynda Treacy
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January 12, 2022 - 9:46 am
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Great to hear! Thanks for letting us know.

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