题解 | #顾客登录名#
顾客登录名
https://www.nowcoder.com/practice/7cbf5e3082954c21a80fc750ce97350f
select cust_id ,cust_name,upper(concat(substring(cust_name,1,2),substring(cust_city,1,3))) user_login from Customers
- 字符串的截取:substring(字符串,起始位置,截取字符数)
- 字符串的拼接:concat(字符串1,字符串2,字符串3,...)
- 字母大写:upper(字符串)