测试alter table shrink space compact cascade及学习user_tables相关列的含义
SQL>altertabletest_shrinkenablerowmovement;--altertableshrinkspace须开启行移动Tablealtered.SQL>selecttable_name,blocks,empty_blocks,num_rows,to_char(last_analyzed,'yyyy-mm-ddhh24:mi:ss'),row_movementfromuse