Question

我有超过1000万条记录，其中包含SQL Server中的IP地址。我需要将地址解析为单独的列以进一步分析它们。我尝试使用PATINDEX，它只能覆盖一个IP地址模式。第一个八位字节必须是50,41或107.其他三个八位字节可以是从单个到三个数字。以下是我使用的50/41 / 107.xxx.xxx.xxx：

SELECT  SUBSTRING(Column_1,PATINDEX('%[50|41|107].[0-9][0-9][0-9].[0-9][0-9][0-9].[0-9]%',Column_1)-2,14)
FROM    table_1

如何在一个查询中捕获所有IP模式（50.x.xxx.xxx，50.xx.x.xxx等）？

Answer 1

您可以使用PARSENAME：

SELECT *
FROM dbo.YourTable
WHERE PARSENAME(YourColumn,4) = '50'

Answer 2

使用Left和Charindex字符串功能。试试这个。

select * from table_1 where
left(Column_1,charindex('.',Column_1)-1) in('50','41','107')

Answer 3

此查询将确保您只捕获4个八位字节的IP地址。

所有八位字节都需要在指定的范围内（当前设置为0-255但可以在where子句中更改）您也可以将BETWEEN a AND b更改为IN（a，b，...）和它只会捕获那些特定的数字。

它还将自己列中的八位字节作为整数返回，如果您需要对特定范围进行分析，这将是向前存储它们的好方法，那么您将来不需要解析文本

注意：由于使用了TRY_CAST，这只适用于SQL Server 2012和

WITH Octet_Position (column_1, position_1, position_2, position_3)
AS
(
    SELECT
        column_1,
        CHARINDEX('.', column_1),
        CHARINDEX('.', column_1, CHARINDEX('.', column_1) + 1),
        CHARINDEX('.', column_1, (CHARINDEX('.', column_1, CHARINDEX('.', column_1) + 1)) + 1)
    FROM Table_1
)
SELECT
    column_1 AS ip_address,
    TRY_CAST(SUBSTRING(column_1, 0, position_1) AS INT) AS octet_1,
    TRY_CAST(SUBSTRING(column_1, position_1 + 1, position_2 - position_1 - 1) AS INT) AS octet_2,
    TRY_CAST(SUBSTRING(column_1, position_2 + 1, position_3 - position_2 -  1) AS INT) AS octet_3,
    TRY_CAST(SUBSTRING(column_1, position_3 + 1, LEN(column_1) - position_3) AS INT) AS octet_4
FROM Octet_Position
WHERE
    --make sure there are three .'s
    position_1 > 0 AND
    position_2 > 0 AND
    position_3 > 0 AND

    --Make sure the octets are numbers
    TRY_CAST(NULLIF(SUBSTRING(column_1, 0, position_1), '') AS INT) IS NOT NULL AND
    TRY_CAST(NULLIF(SUBSTRING(column_1, position_1 + 1, position_2 - position_1 - 1), '') AS INT) IS NOT NULL AND
    TRY_CAST(NULLIF(SUBSTRING(column_1, position_2 + 1, position_3 - position_2 -  1), '') AS INT) IS NOT NULL AND
    TRY_CAST(NULLIF(SUBSTRING(column_1, position_3 + 1, LEN(column_1) - position_3), '') AS INT) IS NOT NULL AND

    --make sure the octects are in the correct range
    TRY_CAST(NULLIF(SUBSTRING(column_1, 0, position_1), '') AS INT) BETWEEN 0 AND 255 AND
    TRY_CAST(NULLIF(SUBSTRING(column_1, position_1 + 1, position_2 - position_1 - 1), '') AS INT) BETWEEN 0 AND 255 AND
    TRY_CAST(NULLIF(SUBSTRING(column_1, position_2 + 1, position_3 - position_2 -  1), '') AS INT) BETWEEN 0 AND 255 AND
    TRY_CAST(NULLIF(SUBSTRING(column_1, position_3 + 1, LEN(column_1) - position_3), '') AS INT) BETWEEN 0 AND 255

在SQL Server中查找IP地址

3 个答案: