在SQL中将字符串转换为HEX

I'm looking for a way to transform a genuine string into it's hexadecimal value in SQL. I'm looking something that is Informix-friendly but I would obviously prefer something database-neutral

我正在寻找一种方法将真正的字符串转换为SQL中的十六进制值。我正在寻找一些Informix友好的东西，但我显然更喜欢数据库中立的东西

Here is the select I am using now:

这是我现在使用的选择：

SELECT SomeStringColumn from SomeTable

Here is the select I would like to use: SELECT hex( SomeStringColumn ) from SomeTable

这是我想要使用的选择：来自SomeTable的SELECT hex（SomeStringColumn）

Unfortunately nothing is that simple... Informix gives me that message: Character to numeric conversion error

不幸的是没有什么是那么简单...... Informix给了我那条消息：字符到数字转换错误

Any idea?

任何想法？

4 个解决方案

#1

Can you use Cast and the fn_varbintohexstr?

你能用Cast和fn_varbintohexstr吗？

SELECT master.dbo.fn_varbintohexstr(CAST(SomeStringColumn AS varbinary)) 
FROM SomeTable

I'm not sure if you have that function in your database system, it is in MS-SQL.

我不确定你的数据库系统中是否有这个功能，它在MS-SQL中。

I just tried it in my SQL server MMC on one of my tables:

我只是在我的一个表上的SQL服务器MMC中尝试过它：

SELECT     master.dbo.fn_varbintohexstr(CAST(Addr1 AS VARBINARY)) AS Expr1
FROM         Customer

This worked as expected. possibly what I know as master.dbo.fn_varbintohexstr on MS-SQL, might be similar to informix hex() function, so possibly try:

这按预期工作。可能我所知的MS-SQL上的master.dbo.fn_varbintohexstr，可能类似于informix hex（）函数，所以可能尝试：

SELECT     hex(CAST(Addr1 AS VARBINARY)) AS Expr1
FROM         Customer

#2

If it is possible for you to do this in the database client in code it might be easier.

如果您可以在代码中的数据库客户端中执行此操作，则可能更容易。

Otherwise the error probably means that the built in hex function can't work with your values as you expect. I would double check the input value is trimmed and in the format first, it might be that simple. Then I would consult the database documentation that describes the hex function and see what its expected input would be and compare that to some of your values and find out what the difference is and how to change your values to match that of the expected input.

否则，错误可能意味着内置的十六进制函数无法按预期使用您的值。我会仔细检查输入值是否被修剪，并且首先采用格式，可能就是这么简单。然后，我将查阅描述十六进制函数的数据库文档，看看它的预期输入是什么，并将其与您的某些值进行比较，找出差异是什么以及如何更改您的值以匹配预期输入的值。

A simple google search for "informix hex function" brought up the first result page with the sentence: "Must be a literal integer or some other expression that returns an integer". If your data type is a string, first convert the string to an integer. It looks like at first glance you do something with the cast function (I am not sure about this).

一个简单的谷歌搜索“informix十六进制函数”提出了第一个结果页面的句子：“必须是一个文字整数或一些返回整数的表达式”。如果您的数据类型是字符串，请首先将字符串转换为整数。看起来乍一看你用cast函数做了些什么（我不确定这个）。

select hex(cast SomeStringColumn as int)) from SomeTable

#3

what about:

关于什么：

declare @hexstring varchar(max);
set @hexstring = 'E0F0C0';
select cast('' as xml).value('xs:hexBinary( substring(sql:variable("@hexstring"), sql:column("t.pos")) )', 'varbinary(max)')
from (select case substring(@hexstring, 1, 2) when '0x' then 3 else 0 end) as t(pos)

I saw this here: http://blogs.msdn.com/b/sqltips/archive/2008/07/02/converting-from-hex-string-to-varbinary-and-vice-versa.aspx

我在这里看到了这个：http：//blogs.msdn.com/b/sqltips/archive/2008/07/02/converting-from-hex-string-to-varbinary-and-vice-versa.aspx

Sorrry, that work only on >MS SQL 2005

Sorrry，仅适用于> MS SQL 2005

#4

OLD Post but in my case I also had to remove the 0x part of the hex so I used the below code. (I'm using MS SQL)

OLD Post，但在我的情况下，我还必须删除十六进制的0x部分，所以我使用下面的代码。（我正在使用MS SQL）

convert(varchar, convert(Varbinary(MAX), YOURSTRING),2)

convert（varchar，convert（Varbinary（MAX），YOURSTRING），2）

#1