如题，帮忙解答下面的语句是什么意思：
alter table scott.t1 enable row movement;
------解决方案--------------------
- SQL code
SQL> select * from t; ACCOUNT STAT---------- ---- 3 欠费 4 欠费SQL> select to_char(sysdate, 'yyyy-mm-dd hh24:mi:ss') from dual;TO_CHAR(SYSDATE,'YY-------------------2009-01-04 22:21:11SQL> insert into t values(12, 'test');已创建 1 行。SQL> commit;提交完成。SQL> select * from t; ACCOUNT STAT---------- ---- 12 test 3 欠费 4 欠费SQL> flashback table t to timestamp '2009-1-4 22:21:11';flashback table t to timestamp '2009-1-4 22:21:11' *第 1 行出现错误:[color=#FF0000][b]ORA-08189: 因为未启用行移动功能, 不能闪回表[/b][/color]SQL> [color=#FF0000]alter table t enable row movement;[/color]表已更改。SQL> flashback table t to timestamp to_timestamp('2009-1-4 22:21:11', 'yyyy-mm-dd hh24:mi:ss');闪回完成。SQL> select * from t; ACCOUNT STAT---------- ---- 3 欠费 4 欠费SQL>