Selection on specific table

Question

Dear All,
Is it possible that user can't select specific table from toad. I already revoke selection from user but user select from toad with no error.
Regards.

Answer 1

SQL> revoke ALL on testtt from test1;
Connected to Oracle Database 11g Enterprise Edition Release 11.1.0.7.0
Connected as SYS
SQL> create table testtt(a number);
create table testtt(a number)
ORA-00955: este nombre ya lo está utilizando otro objeto existente
SQL> create user test1 identified by test1 ;
User created
SQL> grant create session to test1;
Grant succeeded
SQL> grant select , update, delete, insert on testtt to test1;
Grant succeeded
SQL> connect test1/test1
Connected to Oracle Database 11g Enterprise Edition Release 11.1.0.7.0
Connected as test1
SQL> select * from testtt;
select * from testtt
ORA-00942: la tabla o vista no existe
SQL> select * from sys.testtt;
         A
SQL> connect sys as sysdba
Connected to Oracle Database 11g Enterprise Edition Release 11.1.0.7.0
Connected as SYS
SQL> revoke ALL on testtt from test1;
Revoke succeeded
SQL> connect test1/test1
Connected to Oracle Database 11g Enterprise Edition Release 11.1.0.7.0
Connected as test1
SQL> select * from sys.testtt;
select * from sys.testtt
ORA-00942: la tabla o vista no existe
SQL>