select into from 和 insert into select 的用法和区别(转)

转自：http://www.studyofnet.com/news/182.html

select into from 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

INSERT INTO SELECT语句：

语句形式为：

 

Insert into Table2(field1,field2,...) select value1,value2,... from Table1

    --1.创建测试表
    create TABLE Table1
    (
         a varchar(10),
         b varchar(10),
         c varchar(10),
         CONSTRAINT [PK_Table1] PRIMARY KEY CLUSTERED
         (
             a ASC
         )
    ) ON [PRIMARY]

    create TABLE Table2
    (
         a varchar(10),
         c varchar(10),
         d int,
         CONSTRAINT [PK_Table2] PRIMARY KEY CLUSTERED
         (
             a ASC
         )
    ) ON [PRIMARY]
    GO

    --2.创建测试数据
    Insert into Table1 values('赵','asds','')
    Insert into Table1 values('钱','asds','')
    Insert into Table1 values('孙','asds','')
    Insert into Table1 values('李','asds',null)
    GO
    select * from Table2

    --3.INSERT INTO SELECT语句复制表数据
    Insert into Table2(a, c, d) select a,c,5 from Table1
    GO

    --4.显示更新后的结果
    select * from Table2
    GO

    --5.删除测试表
    drop TABLE Table1
    drop TABLE Table2

正确的形式：

INSERT INTO AC02_WYL
  (AAZ159, BAE001, AAB001, AAC001, AAC049)
  SELECT A.AAZ159, A.BAE001, A.AAB001, A.AAC001, 201411
    FROM AC02 A
   WHERE AAB001 = 511500000296;

如图：