MySQL中每组的最大列数
让我们了解如何在MySQL中找到每组列的最大值-
SELECT colName1, MAX(colName2) FROM tableName GROUP BY colName1 ORDER BY colName1;
我们现在将看到一个活生生的例子。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;
输出结果
+--------------+--------------+ | Article | MaxPrice | +--------------+--------------+ | 0001 | 256.05 | | 0002 | 90.50 | | 0003 | 123.10 | +--------------+--------------+
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