1、查看每个owner所占空间大小
select distinct owner, sum(bytes) from dba_segments group by owner;
2、使用sql生成的sql查看每某个owner下的没涨表所占空间的大小
SELECT 'select sum(bytes) FROM dba_segments WHERE owner =' || '''TESTBAR''' ||
' AND segment_type =' || '''TABLE''' || ' AND segment_name = ''' ||
table_name || ''' ;'
from user_tables;