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Asked: 2026-06-03T03:05:20+00:00

Lets say I have a field. Lets call it Barcode1. Right now all Barcodes1

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Lets say I have a field. Lets call it Barcode1. Right now all Barcodes1 are 22 characters with each character is an integer.
Suppose there is a second field Barcode2. Both of these are varchar(22)

My condition in plain english terms is:
Barcode1 is identical to barcode2 except in digits 7,8 where for barcode2, digits 7 and 8 are the same thing in barcode1 plus 20

so 

001214**54**54545654521523
549462**74**48634842135782

I also would like the negation of the where clause where rows that do NOT match the condition are returned.

Thank you.

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1 Answer

  1. Editorial Team

    You’ll have to break that barcode up using string operations, something like:

    WHERE
    substring(barcode1, 0, 6) = substring(barcode2, 0, 6) AND
    substring(barcode1, 9, 2) = substring(barcode2, 0, 9) AND
    etc...

    And since you’ll be doing these comparisons on function results, indexes aren’t going to be used. If this is a frequent operation, you’d be better off splitting up the barcode strings into individual fields so you can compare the individual chunks as fully separate indexable fields.

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