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Message Posted: Wed, 13 Feb 2013 @ 19:51:12 GMT


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Subj:		Re: Need to filter Numeric value from Alphanumeric string

From:		de Wet, Johannes M

Your options are probably either to use a UDF/TRANSLATE function to replace non-numeric values with empty strings, resulting in a numeric-only result (we've had good success with that in the past, using a 'TRANSLATE' function), or hard-code the translation as shown below. Unfortunately, if the string is long you might end up with a long CASE statement...

     SELECT
         'str55555ingd4w5i6th8digit' AS MyString
         ,CASE WHEN SUBSTR(MyString,1,1) BETWEEN 0 and 9 THEN
     SUBSTR(MyString,1,1) ELSE '' END
        ||CASE WHEN SUBSTR(MyString,2,1) BETWEEN 0 and 9 THEN
     SUBSTR(MyString,2,1) ELSE '' END
        ||CASE WHEN SUBSTR(MyString,3,1) BETWEEN 0 and 9 THEN
     SUBSTR(MyString,3,1) ELSE '' END
        ||CASE WHEN SUBSTR(MyString,4,1) BETWEEN 0 and 9 THEN
     SUBSTR(MyString,4,1) ELSE '' END
        ||CASE WHEN SUBSTR(MyString,5,1) BETWEEN 0 and 9 THEN
     SUBSTR(MyString,5,1) ELSE '' END

     etc..

Johannes de Wet
Data and Information Services
Unum


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