在case when中实现变量赋值
我想让orderid等于10253时，让@i的值加1，可是要报错：
use northwind
go
declare @i int
set @i=1;
select case orderid when 10253 then @i=@i+1 else 1 end from orders
请问用select语句怎么实现orderid等于10253时，让@i的值加1？
谢谢

[解决办法]
select @i = case orderid when 10253 then @i+1 else 1 end from orders

[解决办法]
use northwind
go
declare @i int
set @i = 1
select @i = @i + 1 from orders where orderid = 10253