>>>I need to do a SQL command which will search on a field which has 15 characters but the user will enter the last six digits only. So, basically, the first 9 characters are not entered and I must find the record matching the last six digits. I usually do the opposite with the % character at the end combined with a LIKE. Anyone has an example on this type of search?
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>>Well, you can use % in front or use
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>>select .. from myTable where RIGHT(Column,6) = @Last6
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>>May perform marginally better
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>>select .. from myTable where Column LIKE '%' + @Last6
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>Those or the way I was thinking of doing it - but wouldn't that be really slow because there is no matching index? And if so, is it possible to make an index like that?

You can have a computed column with last 6 characters and make an index on this computed column.