Question

我是Azure Stream Analytics查询的新手。我的方案是使用Continuous Export将Application Insight遥测编写到Azure Blob存储，并使用Stream Analytics作业将数据从Blob存储推送到Power BI。我的json文件有Array和Request类型，如下所示：

＆＃13;

{
	"request": [
		{
			"id": "|HLHUdGy4c3g=.556f8524_",
			"name": "HEAD Todos/Index",
			"count": 1,
			"responseCode": 200,
			"success": true,
			"url": "http://todoapp20183001.azurewebsites.net/",
			"urlData": {
				"base": "/",
				"host": "todoapp20183001.azurewebsites.net",
				"hashTag": "",
				"protocol": "http"
			},
			"durationMetric": {
				"value": 973023,
				"count": 1,
				"min": 973023,
				"max": 973023,
				"stdDev": 0,
				"sampledValue": 973023
			}
		}
	],
	"internal": {
		"data": {
			"id": "124c5c1c-0820-11e8-a590-d95f25fd3f7f",
			"documentVersion": "1.61"
		}
	},
	"context": {
		"data": {
			"eventTime": "2018-02-02T13:50:39.591Z",
			"isSynthetic": false,
			"samplingRate": 100
		},
		"cloud": {},
		"device": {
			"type": "PC",
			"roleName": "todoapp20183001",
			"roleInstance": "RD0003FF6D001A",
			"screenResolution": {}
		},
		"user": {
			"isAuthenticated": false
		},
		"session": {
			"isFirst": false
		},
		"operation": {
			"id": "HLHUdGy4c3g=",
			"parentId": "HLHUdGy4c3g=",
			"name": "HEAD Todos/Index"
		},
		"location": {
			"clientip": "35.153.211.0",
			"continent": "North America",
			"country": "United States",
			"province": "Virginia",
			"city": "Ashburn"
		},
		"custom": {
			"dimensions": [
				{
					"_MS.ProcessedByMetricExtractors": "(Name:'Requests', Ver:'1.0')"
				}
			]
		}
	}
}

＆＃13;

使用以下查询，我可以收到预期的输出。

＆＃13;

WITH Request AS
(
    SELECT
        context.location.country as country,
        context.location.city as city,
        GetArrayElement(request,0) as requests
        FROM FromBlob
)

SELECT country, city, requests.name
FROM Request

＆＃13;

现在我需要按城市计算所有请求，但我似乎无法用COUNT（）和GROUP BY（）完成它。在这种情况下是否有提示或参考？

Answer 1

以下是每5分钟计算一次请求数的示例。请注意，我必须向GROUB BY添加一个时间组件，因为您的数据是流数据，并且您希望在有限的时间内获得聚合。

WITH Request AS
(
SELECT
    context.location.country as country,
    context.location.city as city,
    GetArrayElement(request,0) as requests
    FROM iothub
)
SELECT country, city, count(requests.name)
FROM Request
group by country,city,SlidingWindow(minute,5)

让我知道它是否适合你。

在Azure Stream Analytics查询

1 个答案: