select into from 和 insert into select 的用法和区别 -转载
原创    share_i    发表于:2017-11-17 10:39:20
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select into from 和 insert into select都是用来复制表,两者的主要区别为: select into from 要求目标表不存在,因为在插入时会自动创建。insert into select from 要求目标表存在

备份表数据: create table emp as select * from scott.emp

还原表数据:insert into emp select * from scott.emp

1、 复制表结构及其数据:

create table table_name_new as select * from table_name_old

2、只复制表结构:

create table table_name_new as select * from table_name_old where 1=2;

或者:

create table table_name_new like table_name_old

3、 只复制表数据:

如果两个表结构一样:

insert into table_name_new select * from table_name_old

如果两个表结构不一样:

insert into table_name_new(column1,column2...) select column1,column2... from table_name_old
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