题解 | #顾客登录名#
顾客登录名
https://www.nowcoder.com/practice/7cbf5e3082954c21a80fc750ce97350f
#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) select cust_id,cust_name, upper(concat(substring(cust_name,1,2),substring(cust_city,1,3))) as user_login from Customers