rename A to B;
索引不用重新创建
这样才算清楚么：
alitalk_test@OCNTEST>create table a(a number);
Table created.
alitalk_test@OCNTEST>rename a to b;
Table renamed.
alitalk_test@OCNTEST>desc b
Name Null? Type
----------------------------------------------------- -------- ------------------------------------
A NUMBER
alitalk_test@OCNTEST>