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Drop Oracle Instance

Simple steps to remove Oracle instance….
1) Login to the server machine with Oracle user
2) Set ORACLE_HOME, ORACLE_SID
3) Open SQL Plus
[oracle$] sqlplus / as sysdba
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount EXCLUSIVE
ORACLE instance started.
Total System Global Area 3.2068E+10 bytes
Fixed Size                  2214736 bytes
Variable Size            1.5838E+10 bytes
Database Buffers         1.6106E+10 bytes
Redo Buffers              122404864 bytes
Database mounted.
SQL> alter system enable restricted session;
System altered.
SQL> drop database;
Database dropped.
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL>

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