显示MySQL表中具有最高金额的所有产品及其详细信息？

使用MAX()和子查询。此处，使用MAX()来获取最大金额。首先创建一张表 −

mysql> create table DemoTable
(
   ProductId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   ProductName varchar(100),
   ProductAmount int
);
Query OK, 0 rows affected (0.53 sec)

使用insert命令向表中插入一些记录 −

mysql> insert into DemoTable(ProductName,ProductAmount) values('Product-1',60);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(ProductName,ProductAmount) values('Product-2',40);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable(ProductName,ProductAmount) values('Product-3',75);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable(ProductName,ProductAmount) values('Product-4',50);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(ProductName,ProductAmount) values('Product-5',75);
Query OK, 1 row affected (0.12 sec)

使用select语句从表中显示所有记录 −

mysql> select *from DemoTable;

这将生成以下输出 −

+-----------+-------------+---------------+
| ProductId | ProductName | ProductAmount |
+-----------+-------------+---------------+
|         1 | Product-1   |            60 |
|         2 | Product-2   |            40 |
|         3 | Product-3   |            75 |
|         4 | Product-4   |            50 |
|         5 | Product-5   |            75 |
+-----------+-------------+---------------+
5 rows in set (0.00 sec)

以下是查询，显示具有最高金额的所有产品 −

mysql> select *from DemoTable where ProductAmount=(select max(ProductAmount) from DemoTable);

这将生成以下输出 −

+-----------+-------------+---------------+
| ProductId | ProductName | ProductAmount |
+-----------+-------------+---------------+
|         3 | Product-3   |            75 |
|         5 | Product-5   |            75 |
+-----------+-------------+---------------+
2 rows in set (0.00 sec)