Backup Oracle Database in Windows Server

Start cmd

sqlplus / as sysdba

SYS@PRODDB AS SYSDBA>CREATE OR REPLACE DIRECTORY DATA_PUMP_DIR1 AS 'E:\Oracle_Backup';

Create Oracle_Backup directory if necessary.

E:\oracle\product\11.2.0\dbhome_1\BIN>expdp.exe '/ as sysdba' full=y directory=DATA_PUMP_DIR1 dumpfile=expdp_fulldb.dmp logfile=expdp_fulldb.log