摘要： select a.tablespace_name,a.bytes/1024/1024 "Sum MB",(a.bytes-b.bytes)/1024/1024 "used MB",b.bytes/1024/1024 "free MB",round(((a.bytes-b.bytes)/a.bytes)*100,2) "percent_used" from (select tablespace_name,sum(bytes) bytes from dba_data_files group by tablespace_ 阅读全文