sql-将一个表中的数导入另一个表中

    INSERT INTO 目标表 SELECT * FROM 来源表;
例：
    insert into insertTest select * from insertTest2;

INSERT INTO 目标表 (字段1, 字段2, ...) SELECT 字段1, 字段2, ... FROM 来源表;(这里的话字段必须保持一致)
例：
insert into insertTest2(id) select id from insertTest2;

INSERT INTO 目标表  (字段1, 字段2, ...)  
 SELECT 字段1, 字段2, ...  
 FROM 来源表  
 WHERE not exists (select * from 目标表  
 where 目标表.比较字段 = 来源表.比较字段); 

insert into insertTest2
(id,name)
select id,name
from insertTest
where not exists (select * from insertTest2
where insertTest2.id=insertTest.id);

insert into insertTest    
(id, name)    
SELECT 100, ‘liudehua‘    
FROM dual    
WHERE not exists (select * from insertTest    
where insertTest.id = 100);