逻辑体系结构与Data file 逻辑体系结构关系图 逻辑体系结构最小单位BLOCK的研究 block能装多少行数据: drop table test_block_num purge; create table test_block_num (id varchar2(1)); begin for i in 1..8000 loop insert into test_block_num values('a'); end loop; commit; end; / --测试发现,不行. select…
分区清理: --范围分区示例 drop table range_part_tab purge; --注意,此分区为范围分区 create table range_part_tab (id number,deal_date date,area_code number,contents varchar2(4000)) partition by range (deal_date) ( partition p1 values less than (TO_DATE('2012-02-01', 'YYYY-…