Oracle modifies tablespace names and data files

Purpose ： I want to put tablespace tablespace1 Name of and corresponding data file name /u01/app/oradata/oradb/tablespace1.dbf Are modified to tablespace2
System users sys With sysdba Login as ;
modify oracle The steps of tablespace name and data file name are as follows ：
1、 Modify the table space name

alter tablespace /tablespace1 rename to /tablespace2;

2、 Take the modified tablespace offline

alter tablespace /tablespace2 offline;

3、 Then change the name of the data physical file
My file directory is ：
/u01/app/oradata/oradb//tablespace1.dbf
take /tablespace1.dbf It is amended as follows /tablespace2.dbf
PS： Need to switch to oracle User's next operation
4、 Using system users sys With sysdba After logging in as , Execute the following statement ：

alter tablespace /tablespace2 rename datafile '/u01/app/oradata/oradb//tablespace1.dbf' to '/u01/app/oradata/oradb/tablespace2.dbf';

5、 Bring tablespaces Online

alter tablespace /tablespace2 online;

6、 Use SQL Statement query table space usage and remaining

-- Tablespace calculation used 
select sum(bytes/1024/1024/1024) from user_segments;
-- Remaining tablespace calculation 
select sum(bytes/1024/1024/1024) from user_free_space T where tablespace_name=‘tablespace_name’;