oracle plsql

in my application need to send a generic password through mail.
till now we are sending only one generic password but now there is a password restriction that a user cannot use
his/her last 6 previous password.

function to write with multiple generic passwords and it should send randomly the generic password.
thanks.
Sarma VadlamaniprogrammeranalystAsked:
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slightwv (䄆 Netminder) Commented:
I don't understand the question.

Are you wanting to generate a random password?  If so, that can be done with DBMS_RANDOM.STRING.

If you have a list and need to randomly pick one, still pretty easy with DBMS_RANDOM.VALUE.

For the previous 6 passwords, I don't see where generic is involved.  You would need to store them somewhere to make sure the new password wasn't reused.
sdstuberCommented:
hopefully you aren't storing the previous 6 passwords, but rather some kind of irreversible hash of them.

Your function could then simply loop generating new passwords,  hash them and then check the hash against the previous 6 saved hashes.  If it's new, then write the new hash, delete the 7th and then send out the new password.

If by chance you randomly generate a password that was already reused, then loop and try again
In most cases I would assume the loop would execute exactly once because the random password wouldn't repeat very often.

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