MySQL 中每组的最大列数

SELECT colName1, MAX(colName2) FROM tableName GROUP BY colName1 ORDER BY colName1;

我们现在将看到一个实例。假设我们有一个表 PRODUCT -

+---------+--------+
| Article | Price  |
+---------+--------+
| 1       | 255.50 |
| 1       | 256.05 |
| 2       | 90.50  |
| 3       | 120.50 |
| 3       | 123.10 |
| 3       | 122.10 |
+---------+--------+

以下是获取每组最大列数的查询 -

查询

SELECT Article, MAX(Price) AS MaxPrice
FROM Product
GROUP BY Article
ORDER BY Article;

输出

+--------------+--------------+
| Article      | MaxPrice     |
+--------------+--------------+
| 0001         | 256.05       |
| 0002         | 90.50        |
| 0003         | 123.10       |
+--------------+--------------+

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