Temporary backups

SQL> connect sys/secret_password as sysdba; SQL> alter user sysman account unlock ; -- SQL> alter user DBUSER identified by newpa$$word; Next, change the profile limit to unlimited. SQL> alter profile DEFAULT limit PASSWORD_REUSE_TIME unlimited; SQL> alter profile DEFAULT limit PASSWORD_LIFE_TIME unlimited; Check the password expiry date SQL> select username, account_status, EXPIRY_DATE from dba..

An empty string is treated as a null value in Oracle. Let's demonstrate.We've created a table called suppliers with the following table definition:create table suppliers ( supplier_id number, supplier_name varchar2(100) ); Next, we'll insert two records into this table.insert into suppliers (supplier_id, supplier_name ) values ( 10565, null ); insert into suppliers (supplier_id, supplier_name ) ..