title: Generating Random String in PL/SQL(oracle 9i) with restricted Letters
body: <p>I'm trying to generate a Random String using PL/SQL with some restricted letters, because i want to avoid letters like O, o, 0, etc. I heard that this task can be achievable using the listagg function available in oracle 11g. But i want to achieve this using Oracle 9i as we are using this in our environment. Any suggestions will be appreciated.</p>