Backup and Recovery Scenerio-9 (How to perform a point in time tablespace recovery)

How to perform a point in time tablespace recovery? In this exercise, tablespace name is CT_COMMON_DATA?

$ export ORACLE_SID=PrimeDG $ rman target / RMAN> sql 'alter tablespace CT_COMMON_DATA offline'; RMAN> run { set until time "to_date('FEB 28 2008 13:59:00','Mon DD YYYY HH24:MI:SS')"; recover tablespace CT_COMMON_DATA; } RMAN> sql 'alter tablespace CT_COMMON_DATA online'; RMAN> exit;