{ "data": { "question": { "questionId": "3792", "questionFrontendId": "3451", "categoryTitle": "Database", "boundTopicId": 3073058, "title": "Find Invalid IP Addresses", "titleSlug": "find-invalid-ip-addresses", "content": "

Table: logs

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\n+-------------+---------+\n| Column Name | Type    |\n+-------------+---------+\n| log_id      | int     |\n| ip          | varchar |\n| status_code | int     |\n+-------------+---------+\nlog_id is the unique key for this table.\nEach row contains server access log information including IP address and HTTP status code.\n
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Write a solution to find invalid IP addresses. An IPv4 address is invalid if it meets any of these conditions:

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Return the result table ordered by invalid_count, ip in descending order respectively. 

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The result format is in the following example.

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Example:

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Input:

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logs table:

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\n+--------+---------------+-------------+\n| log_id | ip            | status_code | \n+--------+---------------+-------------+\n| 1      | 192.168.1.1   | 200         | \n| 2      | 256.1.2.3     | 404         | \n| 3      | 192.168.001.1 | 200         | \n| 4      | 192.168.1.1   | 200         | \n| 5      | 192.168.1     | 500         | \n| 6      | 256.1.2.3     | 404         | \n| 7      | 192.168.001.1 | 200         | \n+--------+---------------+-------------+\n
\n\n

Output:

\n\n
\n+---------------+--------------+\n| ip            | invalid_count|\n+---------------+--------------+\n| 256.1.2.3     | 2            |\n| 192.168.001.1 | 2            |\n| 192.168.1     | 1            |\n+---------------+--------------+\n
\n\n

Explanation:

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The output table is ordered by invalid_count, ip in descending order respectively.

\n
\n", "translatedTitle": "查找无效的 IP 地址", "translatedContent": "

表：logs

\n\n
\n+-------------+---------+\n| Column Name | Type    |\n+-------------+---------+\n| log_id      | int     |\n| ip          | varchar |\n| status_code | int     |\n+-------------+---------+\nlog_id 是这张表的唯一主键。\n每一行包含服务器访问日志信息，包括 IP 地址和 HTTP 状态码。\n
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编写一个解决方案来查找 无效的 IP 地址。一个 IPv4 地址如果满足以下任何条件之一，则无效：

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返回结果表分别以 invalid_count，ip 降序 排序。

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结果格式如下所示。

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示例：

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输入：

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logs 表：

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\n+--------+---------------+-------------+\n| log_id | ip            | status_code | \n+--------+---------------+-------------+\n| 1      | 192.168.1.1   | 200         | \n| 2      | 256.1.2.3     | 404         | \n| 3      | 192.168.001.1 | 200         | \n| 4      | 192.168.1.1   | 200         | \n| 5      | 192.168.1     | 500         | \n| 6      | 256.1.2.3     | 404         | \n| 7      | 192.168.001.1 | 200         | \n+--------+---------------+-------------+\n
\n\n

输出：

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\n+---------------+--------------+\n| ip            | invalid_count|\n+---------------+--------------+\n| 256.1.2.3     | 2            |\n| 192.168.001.1 | 2            |\n| 192.168.1     | 1            |\n+---------------+--------------+\n
\n\n

解释：

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输出表分别以 invalid_count，ip 降序排序。

\n
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