在MySQL中选择一个float [英] Selecting a float in MySQL

问题描述

我想根据标识符和价格对表进行 SELECT 匹配，例如：

I am trying to do a SELECT match on a table based upon an identifier and a price, such as:

SELECT * FROM `table` WHERE `ident`='ident23' AND `price`='101.31';

< '位返回正确的行。

执行...

SELECT * FROM `table`;

返回与上述相同的行，并清楚地说明 price ='101.31 '。然而选择失败匹配它。将 = 更改为< = 可以使其正常工作，但这不是一个解决方案。

Returns the same row as above and quite clearly states that price='101.31'. Yet select fails to match it. Changing = to <= makes it work - but this is not exactly a solution.

有一种方法可以在对其执行操作之前将MySQL浮点数转换为2位数，从而使上述 SELECT 工作一些其他解决方案）？

Is there a way of casting the MySQL float to 2 digits before the operation is performed on it, thus making the above SELECT work (or some other solution)?

谢谢！

推荐答案

decimal为我工作：

Casting to a decimal worked for me:

SELECT * FROM table WHERE CAST(price AS DECIMAL) = CAST(101.31 AS DECIMAL);

< $ c> column a DECIMAL在第一位。 DECIMAL通常被认为是处理货币价值时最好的类型。

However, you may want to consider just making the price column a DECIMAL in the first place. DECIMAL is generally considered to be the best type to use when dealing with monetary values.

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