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select into from 和 insert into select 的用法和区别

2014-07-03 17:57 447 查看

--查看同一张表中吗，某一个是否字段重复

SELECT a.name,c.collegeName FROM tb_person a,tb_student c WHERE a.uuid = c.uuid and a.socialId in (

SELECT b.socialId

FROM tb_person b

GROUP BY b.socialId

HAVING COUNT(b.socialId) > 1 )

--insert into select

insert into relamanagedaccountandrole(managedAccountId,roleId) select b.accountId,'4028814842a8246d0142a8275a510002' from tb_student a,tb_person b where a.uuid = b.uuid and a.collegeId='402881884370b5bd014370bf8bad0002'
and accountId not in (select managedAccountId from relamanagedaccountandrole)

--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)
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

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。

--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]
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)
GO
--3.SELECT INTO FROM语句创建表Table2并复制数据
select a,c INTO Table2 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

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标签： sql server 2008

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