hi am in oracle database 12c having this error when starting database am in solaris
SQL> startup
ORACLE instance started.
Total System Global Area 1728053248 bytes
Fixed Size 3004520 bytes
Variable Size 1056966552 bytes
Database Buffers 654311424 bytes
Redo Buffers 13770752 bytes
Database mounted.
ORA-01122: database file 1 failed verification check
ORA-01110: data file 1:
'/u01/app/oracle/oradata/dbname/datafile/o1_mf_system_fbj5km7b_.dbf'
ORA-01207: file is more recent than control file - old control file
SQL> select name, thread#, sequence#, status from v$archived_log;
no rows selected