1.        select a.tablespace_name "tbsname", 100-round((nvl(b.bytes_free,0)/a.bytes_alloc)*100,2) "ratio",

          round(a.bytes_alloc/1024/1024,2) "size(M)", round(nvl(b.bytes_free,0)/1024/1024,2) "free(M)",
          round((a.bytes_alloc-nvl(b.bytes_free,0))/1024/1024,2) "usedM)", to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') "get_time"
    from (
          select f.tablespace_name, sum(f.bytes) bytes_alloc, sum(decode(f.autoextensible,'YES',f.maxbytes,'NO',f.bytes)) maxbytes
            from dba_data_files f
           group by tablespace_name) a,
         (select f.tablespace_name, sum(f.bytes) bytes_free
            from dba_free_space f
           group by tablespace_name) b
   where a.tablespace_name = b.tablespace_name
   order by 2;

2.

        SELECT D.TABLESPACE_NAME,SPACE "SUM_SPACE(M)",BLOCKS

SUM_BLOCKS,SPACE-NVL(FREE_SPACE,0) "USED_SPACE(M)",ROUND((1-NVL(FREE_SPACE,0)/SPACE)*100,2) "USED_RATE(%)",FREE_SPACE"FREE_SPACE(M)"FROM(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2)SPACE,SUM(BLOCKS) BLOCKSFROM DBA_DATA_FILESGROUP BY TABLESPACE_NAME) D,(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) FREE_SPACEFROM DBA_FREE_SPACEGROUP BY TABLESPACE_NAME) FWHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)UNION ALL --if have tempfileSELECT D.TABLESPACE_NAME,SPACE "SUM_SPACE(M)",BLOCKS SUM_BLOCKS,USED_SPACE "USED_SPACE(M)",ROUND(NVL(USED_SPACE,0)/SPACE*100,2)"USED_RATE(%)",NVL(FREE_SPACE,0) "FREE_SPACE(M)"FROM(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2)SPACE,SUM(BLOCKS) BLOCKSFROM DBA_TEMP_FILESGROUP BY TABLESPACE_NAME) D,(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES_USED)/(1024*1024),2)USED_SPACE,ROUND(SUM(BYTES_FREE)/(1024*1024),2) FREE_SPACEFROM V$TEMP_SPACE_HEADERGROUP BY TABLESPACE_NAME) FWHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)