Oracle创建表并更新数据

创建表代数据

create table a as select * from TD_DSDM

删除表

drop table a 

创建表不带数据

create table a as select * from TD_DSDM where 1=2

增加主键

注意:复制只会复制表的结构和数据,原始表中的索引,主键等都不会复制。

alter table a add primary key(dsdm,dsmc)

创建并插入数据

create table a as select * from TD_DSDM 

插入数据

insert into a select * from TD_DSDM
insert into a (dsdm,dsmc,JMXXJYJG,SMSJSCKG,PJSJXZKG,SMTXBSCKG,PJTXBXZKG) 
select dsdm,dsmc，JMXXJYJG,SMSJSCKG,PJSJXZKG,SMTXBSCKG,PJTXBXZKG from TD_DSDM

删除表中的数据

delete from a