mysql - INET_ATON 的 SQL Server 等价物是什么

Question

正如问题所说，mySql 中 INET_ATON 的 SQL Server 等价物是什么。我需要这个的原因是因为我从 http://ipinfodb.com/ip_database.php 导入了一个 IP 数据库进入 SQL Server 2005，现在想查询表。但根据他们的示例，我不确定该怎么做。

INET_ATON(expr)

Given the dotted-quad representation of a network address as a string, returns an integer that represents the numeric value of the address. Addresses may be 4- or 8-byte addresses.

mysql> SELECT INET_ATON('209.207.224.40');
        -> 3520061480

Answer 1

看看这些 stored procedure examples为了实现这一目标

CREATE FUNCTION dbo.ipStringToInt 
( 
    @ip CHAR(15) 
) 
RETURNS INT 
AS 
BEGIN 
    DECLARE @rv INT, 
        @o1 INT, 
        @o2 INT, 
        @o3 INT, 
        @o4 INT, 
        @base INT 

    SELECT 
        @o1 = CONVERT(INT, PARSENAME(@ip, 4)), 
        @o2 = CONVERT(INT, PARSENAME(@ip, 3)), 
        @o3 = CONVERT(INT, PARSENAME(@ip, 2)), 
        @o4 = CONVERT(INT, PARSENAME(@ip, 1)) 

    IF (@o1 BETWEEN 0 AND 255) 
        AND (@o2 BETWEEN 0 AND 255) 
        AND (@o3 BETWEEN 0 AND 255) 
        AND (@o4 BETWEEN 0 AND 255) 
    BEGIN      
        SELECT @base = CASE 
            WHEN @o1 < 128 THEN 
                (@o1 * 16777216) 
            ELSE 
                -(256 - @o1) * 16777216 
            END 

        SET @rv = @base +  
            (@o2 * 65536) +  
            (@o3 * 256) + 
            (@o4) 
    END 
    ELSE 
        SET @rv = -1 
    RETURN @rv 
END

示例用法

INSERT mytable VALUES(dbo.ipStringToInt('1.2.3.4'))

如果你想反转它并将一个整数变成一个点分四边形，试试这个

CREATE FUNCTION dbo.ipIntToString 
( 
    @ip bigINT 
) 
RETURNS CHAR(15) 
AS 
BEGIN 
    DECLARE @o1 bigINT, 
        @o2 bigINT, 
        @o3 bigINT, 
        @o4 bigINT 

    IF ABS(@ip) > 4294967295 
        RETURN '255.255.255.255' 

    SET @o1 = @ip / 16777216 

    IF @o1 = 0 
        SELECT @o1 = 255, @ip = @ip + 16777216 

    ELSE IF @o1 < 0 
    BEGIN 
        IF @ip % 16777216 = 0 
            SET @o1 = @o1 + 256 
        ELSE 
        BEGIN 
            SET @o1 = @o1 + 255 
            IF @o1 = 128 
                SET @ip = @ip + 2147483648 
            ELSE 
                SET @ip = @ip + (16777216 * (256 - @o1)) 
        END 
    END 
    ELSE 
    BEGIN 
        SET @ip = @ip - (16777216 * @o1) 
    END 

    SET @ip = @ip % 16777216 
    SET @o2 = @ip / 65536 
    SET @ip = @ip % 65536 
    SET @o3 = @ip / 256 
    SET @ip = @ip % 256 
    SET @o4 = @ip 

    RETURN 
        CONVERT(VARCHAR(4), @o1) + '.' + 
        CONVERT(VARCHAR(4), @o2) + '.' + 
        CONVERT(VARCHAR(4), @o3) + '.' + 
        CONVERT(VARCHAR(4), @o4) 
END