摘要: INDEX RANGE SCAN:索引范围查询 drop table t purge; create table t as select * from dba_objects; update t set object_id=rownum; commit; create index idx_objec 阅读全文
posted @ 2020-02-19 13:00 石shi 阅读(454) 评论(0) 推荐(0) 编辑