高水位线
create table ttt asselect * from all_objects where 1 = 2select bytes from dba_segments where segment_name = 'TTT'65536 --insert into ttt select * from all_objectsrollback select bytes from dba_se...
commit 时间的测试
准备工作: create table t as select * from all_objects ; 1: 一次commit; declare vn_count int ; begin vn_count...