在MySQL中将二进制(16)列显示为十六进制 [英] Display binary(16) column as hex in mysql

问题描述

给出一个二进制(16)列，如何将其值显示为十六进制数?我一直在下面的控制台中进行实验，但未获得预期的结果.可能是我没有将数字正确转换为二进制吗?

Given a binary(16) column, how do I display its value as a hexadecimal number? I've been experimenting in the console a little below, and I'm not getting the results I expect. Could it be that I'm not converting numbers to binary properly?

我有以下示例查询:select hex(cast(10 as binary))，

，但输出结果出乎意料:3130.

but the output is rather unexpected: 3130.

基本上，它看起来只是采用数字的十进制表示，并在每个数字之前插入一个3数字，例如2-> 32，22-> 3232，678-> 363738等

Basically, it appears to just take the decimal representation of the number, and insert a 3 digit before each digit, e.g. 2 -> 32, 22 -> 3232, 678 -> 363738, etc.

如果我为二进制数据类型指定了一个长度(例如binary(16))，除了会在右侧填充所需数量的0 s之外，我会得到相同的行为.

If I specify a length for the binary data type (e.g. binary(16)), I get the same behavior, except that it gets padded on the right with the required number of 0s.

显然，这不是我想要的.我想念什么?

Obviously, that's not what I'm looking for. What am I missing?

只是尝试了convert(678, binary)而不是cast，所以行为相同.

just tried convert(678, binary) instead of cast, same behavior.

推荐答案

为什么使事情变得复杂?我只是用它来显示BINARY(16)列的值:

Why make things complicated? I just use this to display the value of a BINARY(16) column:

SELECT HEX(colname);

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