| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 545 | DEMC104 DE-MC-104 表中某列值为1、1、NULL、2,COUNT(col)结果是? | 0 / 0 | 8 | |
| 625 | DEMC184 DE-MC-184 列值NULL、2、2、3、NULL,COUNT(col)为? | 0 / 0 | 8 |
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