Error for table usage of diferent tablespace

Question

I have a module with a table usage of other tablespace, I'm tried generate but I'm getting a error on table usage (Designer doesn't found this table)
I don't understand, How working with objects of other tablespaces?

Answer 1

Mmhh... I don't think that's what OP is looking for... I'd change your solution as follows :select a.TABLESPACE_NAME,
       a.BYTES/1024/1024 MB_total,
       b.BYTES/1024/1024 + a.AVAIL/1024/1024 MB_free,
       round(((a.BYTES-b.BYTES-a.AVAIL)/a.BYTES)*100,2) percent_used
  from (select TABLESPACE_NAME,
       sum(decode(maxbytes,0,BYTES,maxbytes)) BYTES,
       sum(decode(maxbytes,0,BYTES,maxbytes)) - sum(bytes) AVAIL
          from dba_data_files
         group by TABLESPACE_NAME) a,
       (select TABLESPACE_NAME, sum(BYTES) BYTES
          from dba_free_space
         group by TABLESPACE_NAME) b
where a.TABLESPACE_NAME = b.TABLESPACE_NAME
order by 4 desc;