Generate Upper and Lowercase Alphanumeric Random String in Oracle

Question

How does one generate an upper and lowercase alphanumeric random string from oracle?

I have used select DBMS_RANDOM.STRING(\'x\', 10) from dual to generate

Answer 1

You could start with the Printable option, then strip out any non-alphanumerics:

select SUBSTR(
         TRANSLATE(dbms_random.string('p',100)
            ,'A`~!@#$%^&*()-=_+[]\{}|;'':",./<>?'
            ,'A')
       ,1,10) from dual;

(Note: very rarely, this will return less than 10 characters)

or, map the offending characters to other letters and numbers (although this would reduce the randomness quite a bit):

select TRANSLATE(dbms_random.string('p',10)
            ,'A`~!@#$%^&*()-=_+[]\{}|;'':",./<>? '
            ,'A' || dbms_random.string('x',33)) from dual;

Great question, by the way.

Now, for my bonus points:

The reason Oracle didn't implement this is because no-one asked for it, and it probably is not a high priority.