摘要：
select * from v$version; show user; create table tset (id number,name varchar2(8),addr varchar2(20)); desc user_segments; select segment_name,tablespa 阅读全文
摘要：
create table tset as select * from dba_objects; select count(*) from tset; select table_name,blocks,empty_blocks from dba_tables where table_name=’TSE 阅读全文