题解 | 未下单用户登陆渠道统计
未下单用户登陆渠道统计
https://www.nowcoder.com/practice/5090553d7854458987997a5c91c30975
select channel, 1 from user_info where uid not in(select distinct uid from order_log) order by channel limit 1
未下单用户登陆渠道统计
https://www.nowcoder.com/practice/5090553d7854458987997a5c91c30975
select channel, 1 from user_info where uid not in(select distinct uid from order_log) order by channel limit 1
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