文档解释
ORA-14704: Create table as select disallowed for SYSTEM patitioned tables
Cause: User attempted to create a SYSTEM partitioned table by doing a create table as select.
Action: Do a create table followed by an insert as select into each partition.
ORA-14704 表明，已有的系统分区表无法使用Create Table As Select（CTAS）语句或其衍生语句来重新创建。
官方解释
常见案例
正常处理方法及步骤
1.确认表是否为系统分区表，可以使用”select * from user_objects where object_type = ‘TABLE’ and partitioned=’YES’;”语句
2.如果是系统分区表，则禁止使用CTAS重新创建表
3.使用ALTER TABLE语句对系统分区表进行修改，添加或删除分区
