Select into,Insert into Select
1.INSERT INTO SELECT语句
语句形式为:Insert into Table2(field1,field2,…) select value1,value2,… from Table1
要求目标表Table2必须存在,由于目标表Table2已经存在,所以我们除了插入源表Table1的字段外,还可以插入常量。示例如下:
INSERT INTO SELECT语句复制表数据
–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
2.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。示例如下:
SELECT INTO FROM创建表并复制表数据