在 SQL Server 中存储 IP 地址最合适的数据类型是什么?
最推荐在 SQL Server 中存储 IPv4 地址的数据类型是什么?
What should be the most recommended datatype for storing an IPv4 address in SQL server?
或者也许有人已经为它创建了一个用户 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) 最忠实于它所代表的内容,并允许轻松进行子网掩码样式的查询.但是,如果您实际上是在文本表示之后,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.
一个很少使用的 SQL Server 函数,如果您将其存储为字符串可能会有所帮助 PARSENAME
,顺便说一句.不是为 IP 地址设计的,但非常适合它们.下面的调用将返回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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