SQL> select name from v$tablespace;

NAME
------------------------------
SYSAUX
SYSTEM
UNDOTBS1
USERS
TEMP
TEST

6 rows selected.

SQL> alter tablespace users offline;

Tablespace altered.

SQL> exit

[oratest@oracle dbs]$ date
Wed Sep  8 22:15:37 IST 2021

Connect RMAN and backup tablespace 

[oratest@oracle dbs]$  rman target/

Recovery Manager: Release 19.0.0.0.0 - Production on Wed Sep 8 22:16:02 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

connected to target database: TEST (DBID=2378581000)

RMAN> restore tablespace users until time "to_date
('08-SEP-2021 22:15:37','DD-MON-YYYY:HH24:MI:SS')";

Starting restore at 08-SEP-21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=66 device type=DISK

channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00007 to 
/u01/app/oracle/oradata/TEST/users01.dbf
channel ORA_DISK_1: reading from backup piece 
/u01/app/oracle/oradata/TEST/backup/1408j583_1_1
channel ORA_DISK_1: piece handle=
/u01/app/oracle/oradata/TEST/backup/1408j583_1_1 tag=TAG20210908T221323
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
Finished restore at 08-SEP-21

[oracle@oracle ~]$ rman target/

RMAN> restore tablespace users;
Starting restore at 08-SEP-21
using channel ORA_DISK_1
skipping datafile 5; already restored to file 
/u01/app/oracle/oradata/TEST/datafile/users.dbf
restore not done; all files read only, offline, excluded, or already restored
Finished restore at 08-SEP-21

RMAN> recover tablespace users;
Starting recover at 08-SEP-21
using channel ORA_DISK_1
starting media recovery
archived log for thread 1 with sequence 32 is already on disk as file 
/u01/app/oracle/fast_recovery_area/TEST/archivelog/2021_09_02/o1_mf_1_32_jlzwlxjb_.arc
media recovery complete, elapsed time: 00:00:12
Finished recover at 08-SEP-21
RMAN> exit
Recovery Manager complete.

[oratest@oracle ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Wed Sep 8 22:51:07 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

SQL> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/TEST/system01.dbf
/u01/app/oracle/oradata/TEST/test03.dbf
/u01/app/oracle/oradata/TEST/sysaux01.dbf
/u01/app/oracle/oradata/TEST/undotbs01.dbf
/u01/app/oracle/oradata/TEST/test01.dbf
/u01/app/oracle/oradata/TEST/users01.dbf

6 rows selected.

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