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 | +---------+--------+登录后复制
查询
SELECT Article, MAX(Price) AS MaxPrice FROM Product GROUP BY Article ORDER BY Article;登录后复制
