Oracle database is now a mature and popular RDBMS which is used by lots of enterprises. With its evolution, many utilities and applications are developed around it as well. Now Oracle database also provides cloud support. As a DBA, managing Oracle database is daily routine work and some tools may be used frequently. One of them is sqlplus, the command line tool for executing SQL command.sqlplus is installed while the Oracle database is installed. To start sqlplus, one just needs to open a terminal and then type sqlplus. Then it will connect to the default schema and will prompt you to enter th...