查看當(dāng)前用戶每個(gè)表占用空間的大小： Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name查看每個(gè)表空間占用空間的大小： ;Select Tablespace_Name,Sum(bytes)/1024/1024 From Dba_Segments Group By Tablespace_Name