select into 和insert into select
select into:
创建测试语句
create database MyDemoTest go use MyDemoTest go create table A ( a int primary key, b int, ) go insert into A values(1,1), (2,2), (3,3)
执行核心语句:
select a,b into B from A
执行结果:
由这个结果我们可以知道,B表在插入的时候并不存在
insert into select:
drop table B create table B ( a int primary key, b int, ) go insert into B(a,b) select a,b from A