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将两列的值相乘并在MySQL中将其显示为新列？

2024-04-30 12:00:04 528

让我们首先创建一个表-

mysql> create table DemoTable
   -> (
   -> NumberOfItems int,
   -> Amount int
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values(4,902);

mysql> insert into DemoTable values(5,1000);

mysql> insert into DemoTable values(3,80);

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

输出结果

+---------------+--------+
| NumberOfItems | Amount |
+---------------+--------+
|             4 | 902    |
|             5 | 1000   |
|             3 | 80     |
+---------------+--------+
3 rows in set (0.00 sec)

以下是数据库操作的查询-

mysql> select NumberOfItems,Amount,(NumberOfItems*Amount) AS PayableAmount from DemoTable;

输出结果

+---------------+--------+---------------+
| NumberOfItems | Amount | PayableAmount |
+---------------+--------+---------------+
|             4 | 902    |         3608  |
|             5 | 1000   |         5000  |
|             3 | 80     |         240   |
+---------------+--------+---------------+
3 rows in set (0.00 sec)

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将两列的值相乘并在MySQL中将其显示为新列？

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