题解 | #顾客登录名#
顾客登录名
https://www.nowcoder.com/practice/7cbf5e3082954c21a80fc750ce97350f
//这道题解法就是需要知道Mysql 字符串处理方法
LEFT() 左侧开头截取字符吃
UPPER()字符串变为大写
CONCAT()拼接字符串
select cust_id,cust_name, CONCAT(UPPER(LEFT(cust_contact,2)),UPPER(LEFT(cust_city,3)))as user_login
from Customers;