MySQL Group By - 前 3 行和第 n 行

Question

我有一个像这样的 MySQL 表:

+------+--------+--------+
| ID   | UserID | Score  |
+------+--------+--------+
| 1    | 3      | 12     |
| 2    | 3      | 11     |
| 3    | 3      | 12     |
| 4    | 2      | 14     |
| 5    | 4      | 8      |
| 6    | 2      | 13     |
+------+--------+--------+

据此，我想获得整个表格中的前 3 个分数以及特定用户的最高分数

+------+--------+--------+
| ID   | UserID | Score  |
+------+--------+--------+
| 4    | 2      | 14     |
| 6    | 2      | 13     |
| 3    | 3      | 12     |
| 5    | 4      | 8      |
+------+--------+--------+

这是我可以在单个查询中完成的事情吗？

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Answer 1

剧透警告；)

(SELECT * FROM tableA ORDER BY score DESC LIMIT 3)
UNION
(SELECT * FROM tableB WHERE UserID = 4 ORDER BY score DESC LIMIT 1);