2022-11-23: 分数排名。输出结果和表的sql如下。请写出输出结果的sql语句?
2022-11-23: 分数排名。输出结果和表的sql如下。请写出输出结果的sql语句?
+——-+——+
| score | rank |
+——-+——+
| 4.00 | 1 |
| 4.00 | 1 |
| 3.85 | 2 |
| 3.65 | 3 |
| 3.65 | 3 |
| 3.50 | 4 |
+——-+——+
DROP TABLE IF EXISTS scores;
CREATE TABLE scores (
id int(11) NOT NULL,
score decimal(10,2) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO scores VALUES ('1', '3.50');
INSERT INTO scores VALUES ('2', '3.65');
INSERT INTO scores VALUES ('3', '4.00');
INSERT INTO scores VALUES ('4', '3.85');
INSERT INTO scores VALUES ('5', '4.00');
INSERT INTO scores VALUES ('6', '3.65');
答案2022-11-23:
sql语句如下:
select a.score as score,
(select count(distinct b.score) from scores b where b.score >= a.score) as rank
from scores a
order by a.score desc
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每天一问,为啥不用窗口函数呢?