摘要：
select username,account_status from dba_users where account_status='OPEN'; 阅读全文
摘要：
select * from (Select a.tablespace_name, to_char(a.bytes / 1024 / 1024, '99,999.999') total_bytes, to_char(b.bytes / 1024 / 1024, '99,999.999') free_b 阅读全文