JWONG/xxxxxxxx@DB1
JWONG/xxxxxxxx@DB2
JWONG/xxxxxxxx@DB3 
JWONG/xxxxxxxx@DB4 as sysdba 
SYS/xxxxxxxx@DB5 as sysdba 
SYS/xxxxxxxx@DB6 as sysdba 
SYS/xxxxxxxx@DB7 as sysdba 