什么是二元精度？ [英] What is Binary Precision?

问题描述

我正在阅读ORACLE中的数据类型。我知道BINARY_FLOAT，BINARY_DOUBLE使用二进制精度，这使得它们比NUMBER更有效，因为NUMBER使用小数精度。



请解释二进制精度。

I was reading about datatypes in ORACLE. I get to known that BINARY_FLOAT, BINARY_DOUBLE use binary precision which make them more efficient than NUMBER as NUMBER use decimal precision.

Please explain about binary precision.

推荐答案

二进制精度是计算机内存中浮点数和双精度数的通常表示形式（维基百科的IEEE浮点 [ ^ ]）。机器硬件已针对使用进行了优化。

但请注意，数据库提供小数精度数据类型的原因（例如，参见decimal32浮点格式页面[ ^ ]）。

The binary precision is the 'usual' representation of float and doubles in computer memory ("IEEE floating point" at Wikipedia[^]). Machine hardware is optimized for using it.
However, please note, there's a reason why databases provide decimal precision data types (see, for instance, the "decimal32 floating-point format" page at Wikipedia[^]).

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