| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 527 | DEMC086 DE-MC-086 按用户和天建汇总表,其合理主键或唯一约束是? | 0 / 0 | 5 | |
| 607 | DEMC166 DE-MC-166 日活汇总表每行代表一个用户和一个业务日。哪种唯一约束匹配该粒度? | 0 / 0 | 5 |
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