select into:

　　創建測試語句

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)

　　執行核心語句:

select a,b into B from A

　　執行結果:

　　由這個結果我們可以知道,B表在插入的時候並不存在

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

select into 和insert into select