SQL> alter tablespace cifdb offline;
cp /u01/app/oracle/oradata/cifdb.dbf /u01/app/oracle/oradata/CIFDB/cifdb.dbf
SQL> alter tablespace cifdb rename datafile '/u01/app/oracle/oradata/cifdb.dbf' to '/u01/app/oracle/oradata/CIFDB/cifdb.dbf';
SQL> alter tablespace cifdb online;
SQL> select name from v$datafile;
SQL> select file_name, tablespace_name from dba_data_files where tablespace_name='cifdb';
SQL> shutdown immediate;
cp /u01/app/oracle/oradata/cifdb.dbf /u01/app/oracle/oradata/CIFDB/cifdb.dbf
SQL> startup mount;
SQL> alter database rename file '/u01/app/oracle/oradata/cifdb.dbf' to '/u01/app/oracle/oradata/CIFDB/cifdb.dbf';
SQL> alter database open;
SQL> select name from v$datafile;
SQL> select file_name, tablespace_name from dba_data_files where tablespace_name='cifdb';
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