1.定义变量时可以直接赋值
declare @id int = 5
2.insert 语句可以一次插入多行数据
insert into statelist values(@id, ‘wa’), (@id + 1, ‘fl’), (@id + 2, ‘ny’)
3.支持+=操作符
set stateid += 1
完整示例如下：
复制代码 代码如下:
create table statelist(stateid int, statename char(2))
go
— declare variable and assign a value in a single statement
declare @id int = 5
— insert multiple rows in a single statement with ids 5, 6, and 7
insert into statelist values(@id, ‘wa’), (@id + 1, ‘fl’), (@id + 2, ‘ny’)
— use compound assignment operator to increment id values to 6, 7, and 8
update statelist
set stateid += 1
— view the results
select * from statelist
结果集为：
stateid statename
——- ———
6 wa
7 fl
8 ny
(3 row(s) affected)