MySQL 中每组列的最大值
mysqlmysqli database
让我们了解如何在 MySQL 中查找每组列的最大值 −
SELECT colName1, MAX(colName2) FROM tableName GROUP BY colName1 ORDER BY colName1;
现在我们将看到一个实例。假设我们有一个表 PRODUCT −
<PRODUCT>
+---------+--------+ | Article | Price | +---------+--------+ | 1 | 255.50 | | 1 | 256.05 | | 2 | 90.50 | | 3 | 120.50 | | 3 | 123.10 | | 3 | 122.10 | +---------+--------+
以下是获取每组列的最大值的查询 −
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 | +--------------+--------------+
