1. 新增一个表，通过另一个表的结构和数据

 create table XTHAME.tab1 as select * from DSKNOW.COMBDVERSION

 2. 如果表存在： insert into tab1 select * from tab2; 

3.同一个表中，将A字段的指赋给B字段： update table_name set B =  A; 

4. 将一个表的字段数据插入到另一个表的字段数据中 insert into XTHAME.tab1(pk_bdversion,vbdcode)  select pk_bdversion,vbdcode from  DSKNOW.COMBDVERSION; 

* 如果报提醒：ORA-00928: 缺失 SELECT 关键字错误 原因是：这里tab1(Field1,Field2,....)不能加单引号 

5. 第4点的延伸，多个表的多个字段，插入同一个表的多个字段。 

 INSERT INTO XTHAME.BUTTON (button_id, button_name, button_code)  select a.pk_examquest, b.pk_bdversion,a.vquestname  FROM  DSKNOW.COMBDVERSION b ,DSKNOW.RQT_EXAMQUEST a  where a.pk_examquest='1001SX1000000000JOBV' and b.pk_bdversion='1000BDV1000010101001';