问题描述
在SQL Server中存储IPv4地址的最推荐数据类型是什么?
What should be the most recommended datatype for storing an IPv4 address in SQL server?
或者也许有人已经为其创建了用户SQL数据类型(.Net程序集)?
我不需要排序.
推荐答案
将IPv4地址存储为 binary (4)最真实地表示它，并且允许简单的子网掩码样式查询.但是，如果您实际上是在文本表示形式之后，则需要进行输入和输出转换.在这种情况下，您可能更喜欢字符串格式.
Storing an IPv4 address as a binary(4) is truest to what it represents, and allows for easy subnet mask-style querying. However, it requires conversion in and out if you are actually after a text representation. In that case, you may prefer a string format.
如果您将其存储为字符串，则很少使用的SQL Server函数可能是 PARSENAME .不是为IP地址设计的，但非常适合它们.下面的呼叫将返回"14":
A little-used SQL Server function that might help if you are storing as a string is PARSENAME, by the way. Not designed for IP addresses but perfectly suited to them. The call below will return '14':
SELECT PARSENAME('123.234.23.14', 1)
(编号从右到左).
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