MySQL 中保存某一列的分組最大值的行

讓我們了解如何在MySQL 中尋找保存特定列的分組最大值的行-

尋找保存分組最大值的行的語法MySQL 中特定列的最大值如下-

SELECT colName1, colName2, colName3
FROM tableName s1
WHERE colName3=(SELECT MAX(s2. colName3)
FROM tableName s2
WHERE s1. colName1= s2. colName1)
ORDER BY colName1;

假設我們有以下產品表-

#

+---------+----------+--------+
| 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 |
+---------+----------+--------|

以下是查詢−

################################################# #

SELECT Article, Warehouse, Price
FROM Product p1
WHERE Price=(SELECT MAX(p2. Price)
FROM Product p2
WHERE p1. Article= p2. Article)
ORDER BY Article;

###輸出###

+-------------+----------------+------------+
| Article     | Warehouse      | Price      |
+-------------+----------------+------------+
| 0001        | North          | 256.05     |
| 0002        | South          | 90.50      |
| 0003        | East           | 123.10     |
+-------------+----------------+------------+

###上面的查詢使用了相關子查詢。 ###

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