| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 511 | DEMC070 DE-MC-070 聚合后再连接一对多维表,金额可能重复,合理做法是? | 0 / 0 | 5 | |
| 591 | DEMC150 DE-MC-150 交易表一单一行,标签表同一订单有多种标签。只想统计每笔订单一次,应怎样连接? | 0 / 0 | 5 |
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