sql server 数据转换问题求解

use webshop
go
select c_turename as 会员姓名,域名=right (c_email,len(c_email)-charindex('@',c_email))
from customers

这个语句如何变成功能相同的left语句

select c_turename as 会员姓名,域名=replace(c_email, left(c_email,charindex('@',c_email))，"")