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Editorial Team
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Asked: 2026-06-10T02:10:17+00:00

I’m trying to query a string to match within a range in the database.

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I’m trying to query a string to match within a range in the database. The table has 2 columns FromCode and ToCode.

Below is the sample data (assume the table is called CodeList):

FromCode    ToCode
IV1 0AA     IV9 9ZZ
IV10 0AA    IV28 9ZZ
IV30 0AA    IV32 9ZZ
IV36 0AA    IV36 9ZZ
IV40 0AA    IV49 9ZZ
IV51 0AA    IV56 9ZZ
IV63 0AA    IV63 9ZZ

So, if I run the query

SELECT *
FROM CodeList
WHERE FromCode <= 'IV1 1AB' AND ToCode >= 'IV1 1AB'

It would return the result

IV1 0AA   IV9 9ZZ

which is correct. But, when I run this:

SELECT *
FROM CodeList
WHERE FromCode <= 'IV2 1AB' AND ToCode >= 'IV2 1AB'

The result I get back is

IV1 0AA    IV9 9ZZ
IV10 0AA   IV28 9ZZ

So, to a human the string IV2 2AB is within IV1 0AA - IV9 9ZZ not IV10 0AA - IV28 9ZZ.

If anyone could suggest a better way to search through the data it’d be much appreciated. Also, the engine I’m running this on is SQL Server 2012.

Many thanks!

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1 Answer

  1. Editorial Team
    SELECT *
FROM CodeList
WHERE Cast(Substring(Replace(FromCode,' ',''),3,Len(Replace(FromCode,' ',''))-4) as int) <= Cast(Substring(Replace('IV2 1AB',' ',''),3,Len(Replace('IV2 1AB',' ',''))-4) as int)
 AND Cast(Substring(Replace(ToCode,' ',''),3,Len(Replace(ToCode,' ',''))-4) as int) >= Cast(Substring(Replace('IV2 1AB',' ',''),3,Len(Replace('IV2 1AB',' ',''))-4) as int)

    set it in a function to make use more easy

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