表空间离线
SQL> alter tablespace rcat offile；
2.删除用户
SQL>drop user ractowner cascade
3.删除表空间以及数据文件
DROP TABLESPACE rcat INCLUDING CONTENTS AND DATAFILES;
4.使用RMAN查看 .dbf文件 是否还存在。
RMAN> report schema;
Report of database schema for database with db_unique_name ORCL
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 720 SYSTEM *** +DATA/orcl/datafile/system.256.894905947
2 610 SYSAUX *** +DATA/orcl/datafile/sysaux.257.894905947
3 110 UNDOTBS1 *** +DATA/orcl/datafile/undotbs1.258.894905947
4 5 USERS *** +DATA/orcl/datafile/users.259.894905947
5 345 EXAMPLE *** +DATA/orcl/datafile/example.265.894906137
List of Temporary Files
=======================
File Size(MB) Tablespace Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1 29 TEMP 32767 +DATA/orcl/tempfile/temp.264.894906125
RMAN>
