How does one prevent a column in a database from being visable to end users

I have a password column I would like to hide by default from any one with query access. How does one do this?

If you're on 10G you can use encryption.
First create a wallet en create the master encryption key with:
alter system set encryption key identified by "<secretpwd>";
Then you can encrypt a column in a table with the command:
alter table <tablename> modify <column> encrypt;
If the wallet is open you can query the column. If the wallet is closed you cannot query the column ....
Grtx

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