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