select into from(mysql不支持) 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。
create table table_name_new as select * from table_name_old
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
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