Let us understand how to find the maximum of a column per group in MySQL −
SELECT colName1, MAX(colName2) FROM tableName GROUP BY colName1 ORDER BY colName1;
We will now see a live example. Let’s say we have a table PRODUCT −
<PRODUCT>
+---------+--------+ | Article | Price | +---------+--------+ | 1 | 255.50 | | 1 | 256.05 | | 2 | 90.50 | | 3 | 120.50 | | 3 | 123.10 | | 3 | 122.10 | +---------+--------+
Following is the query to get the maximum of column per group −
Query
SELECT Article, MAX(Price) AS MaxPrice FROM Product GROUP BY Article ORDER BY Article;
Output
+--------------+--------------+ | Article | MaxPrice | +--------------+--------------+ | 0001 | 256.05 | | 0002 | 90.50 | | 0003 | 123.10 | +--------------+--------------+