Oracle -- 查看所有表空间大小、剩余量、当前用户各表所占表空间

1.查看所有表空间大小、剩余量

selectdbf.tablespace_name,
       dbf.totalspace "总量(M)",
       dbf.totalblocks as 总块数,
       dfs.freespace "剩余总量(M)",
       dfs.freeblocks "剩余块数",
       (dfs.freespace / dbf.totalspace) * 100"空闲比例"
  from (select t.tablespace_name,
               sum(t.bytes) / 1024 / 1024totalspace,
               sum(t.blocks) totalblocks
          from dba_data_files t
         group by t.tablespace_name) dbf,
       (select tt.tablespace_name,
               sum(tt.bytes) / 1024 / 1024freespace,
               sum(tt.blocks) freeblocks
          from dba_free_space tt
         group by tt.tablespace_name) dfs
 where trim(dbf.tablespace_name) =trim(dfs.tablespace_name)

2.查看当前用户各表所占表空间

Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name;

3.查看一下谁在用临时段

SELECT se.username,
       se.SID,
       se.serial#,
       se.sql_address,
       se.machine,
       se.program,
       su.TABLESPACE,
       su.segtype,
       su.CONTENTS
  FROM v$session se, v$sort_usage su
 WHERE se.saddr = su.session_addr;