| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 516 | DEMC075 DE-MC-075 统计客户未下单者,用客户左连接订单后筛选? | 0 / 0 | 2 | |
| 596 | DEMC155 DE-MC-155 筛选从未支付过订单的客户,支付记录可一人多行。哪类表达式较稳妥? | 0 / 0 | 2 |
By signing up a Hydro universal account, you can submit code and join discussions in all online judging services provided by us.