insert into 和select 結合使用

1.語法

insert into 新建表名 （新建表的字段）

select 字段1，字段2，字段3 ······

2.例子

insert into newtb (district,districtid,town,townid,village,villageid)
select infotb.district,infotb.districtid,infotb.town,infotb.townid,infotb.village,dictionary.villageid
from infotb,dictionary
where infotb.village like dictionary.village and infotb.town like dictionary.town and infotb.districtid like dictionary.districtid;

3.select的特殊用法

select 1 from 表名 

查詢結果為表內數據個1

select 后邊還可以直接跟字符串或數字，查詢結果的的對應字段處都是該數字或者字符串。