Add DataFile for TableSpace

1. List the DataFile information for reference:
   select TABLESPACE_NAME, File_Name,BYTES/1048576 as "SIZE (MB)" from sys.dba_data_files order by TABLESPACE_NAME,File_Name
2. Add DataFile into the TableSpace of LogData
   alter tablespace LOG adddatafile ' /oradata/mcs/log02.dbf ' size 5000M;