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The Rows Holding the Group-wise Maximum of a Certain Column in MySQL
Let us understand how to find the rows that hold the group wise maximum of a specific column in MySQL −
The syntax to find the rows that hold the group-wise maximum of a specific column in MySQL is as follows −
SELECT colName1, colName2, colName3 FROM tableName s1 WHERE colName3=(SELECT MAX(s2. colName3) FROM tableName s2 WHERE s1. colName1= s2. colName1) ORDER BY colName1;
Let’s say we have the following PRODUCT Table −
<PRODUCT>
+---------+----------+--------+ | Article | Warehouse| Price | +---------+----------+--------+ | 1 | North | 255.50 | | 1 | North | 256.05 | | 2 | South | 90.50 | | 3 | East | 120.50 | | 3 | East | 123.10 | | 3 | East | 122.10 | +---------+----------+--------|
Following is the query −
Query
SELECT Article, Warehouse, Price FROM Product p1 WHERE Price=(SELECT MAX(p2. Price) FROM Product p2 WHERE p1. Article= p2. Article) ORDER BY Article;
Output
+-------------+----------------+------------+ | Article | Warehouse | Price | +-------------+----------------+------------+ | 0001 | North | 256.05 | | 0002 | South | 90.50 | | 0003 | East | 123.10 | +-------------+----------------+------------+
The above query used a correlated subquery.
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