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
复制代码 代码如下:
–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
复制代码 代码如下:
–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