SELECT INTO FROM 与 insert into from

1.SELECT INTO FROM语句

      语句形式为：SELECT vale1, value2 into Table2 from Table1

     要求目标表Table2不存在，因为在插入时会自动创建表Table2，并将Table1中指定字段数据复制到Table2中，请注意vale1,vale2一定要是Table1有的字段，否则就会出错
。示例如下： 

 1  --1.创建测试表 2     create TABLE Table1 3     ( 4         a varchar(10), 5         b varchar(10), 6         c varchar(10), 7         CONSTRAINT [PK_Table1] PRIMARY KEY CLUSTERED 8         ( 9             a ASC10         )11     ) ON [PRIMARY]12     GO13 14     --2.创建测试数据15     Insert into Table1 values('赵','asds','90')16     Insert into Table1 values('钱','asds','100')17     Insert into Table1 values('孙','asds','80')18     Insert into Table1 values('李','asds',null)19     GO20 21     --3.SELECT INTO FROM语句创建表Table2并复制数据22     select a,c INTO Table2 from Table123     GO

如果像这样：

select count(*) into Table2 from table1

就会出错，因为Table1没有count(*)这个字段。

2、insert into from語句

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','90')Insert into Table1 values('钱','asds','100')Insert into Table1 values('孙','asds','80')Insert into Table1 values('李','asds',null)GOselect * from Table2--3.INSERT INTO SELECT语句复制表数据Insert into Table2(a, c, d) select a,c,5 from Table1GO

從Table1表中查詢出a,c數據插入到Table2表。

来源：https://www.cnblogs.com/koeltp/archive/2012/01/17/2324973.html