Question

我有两个Rawdata事件，其中一个是带有一个时间戳的请求，另一个是具有不同时间跨度的响应，是否有一个kusto函数可以从rawdata中提取这两个日期并在两者之间进行时差< / p>

Answer 1

是的，有。在没有看到输入数据样本的情况下为您提供最佳选择有些挑战，但是您可能需要查看parse运算符：https://docs.microsoft.com/en-us/azure/kusto/query/parseoperator或extract()函数：{{3 }}

或者，在您的问题中包含示例输入，例如以下内容：

print request = "this<>is!!!my-request from 2019-08-14 17:54:36.8892211, the end",
      response = "this is the matching 2019-08-14 17:55:36.0000033 response"
| parse request with * "from " request_datetime:datetime "," *
| parse response with * "matching " response_datetime:datetime " response"
| project diff = response_datetime - request_datetime
// this returns a single table with a single column named 'diff', whose value is '00:00:59.1107822'

或

datatable(event_text:string, correlation_id:long) [
    "this<>is!!!my-request from 2019-08-14 17:54:36.8892211, the end", 1,
    "this is the matching 2019-08-14 17:55:36.0000033 response", 1,
]
| extend dt = extract(@"(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{7})", 1, event_text, typeof(datetime))
| summarize diff = max(dt) - min(dt) by correlation_id
// this returns a single table with 2 columns named 'correlation_id' and 'diff', whose values are are '1' and '00:00:59.1107822'

Answer 2

Yoni 的回答向您展示了如何提取时间戳。拥有它们后，您可以使用 datetime_diff 函数。假设您想知道 2 个时间戳之间相差多少秒：

| extend TimeDiff = datetime_diff('second', SigninTime, EventTime)

您可以使用此信息进行过滤。假设您只想保留这些时间戳彼此在 20 秒内的行：

| filter TimeDiff < 20

https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/datetime-difffunction

如何使用KUSTO提取两个请求之间的时间差

2 个答案: