SQL> conn chen/chen
Connected.

SQL> select current_scn from v$database;
select current_scn from v$database
*
ERROR at line 1:
ORA-00942: table or view does not exist

SQL> conn /as sysdba
Connected.
SQL> grant select on v$database to chen;
grant select on v$database to chen
*
ERROR at line 1:
ORA-02030: can only select from fixed tables/views

SQL> select synonym_name,table_name from dba_synonyms where synonym_name='V$DATABASE';

SYNONYM_NAME TABLE_NAME
------------------------------ ------------------------------
V$DATABASE V_$DATABASE

SQL> grant select on v_$database to chen;
Grant succeeded.

SQL> conn chen/chen
Connected.
SQL> select current_scn from v$database;

CURRENT_SCN
-----------
1072571

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ORA-02030

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