oracle下查看表、索引、分区表用空间大小

其实是网上找到的，怕不记得就写到这里：

0、查看用户表、索引、分区表占用空间

select segment_name, sum(bytes)/1024/1024 Mbytese from user_segments group by segment_name;

1、表占用空间

select segment_name, sum(bytes)/1024/1024 Mbytese from user_segments where segment_type='TABLE' group by segment_name;

2、索引占用空间select segment_name ,sum(bytes)/1024/1024 from user_segments where segment_type ='INDEX' group by segment_name;

3、分区表TABLE PARTITION占用空间

select segment_name,sum(bytes)/1024/1024 Mbytes from user_segments where segment_type='TABLE PARTITION' group by segment_name;