azure 数据资源管理器 (kusto) 中的行到列答案

【问题标题】：Rows to columns in azure data explorer (kusto)azure 数据资源管理器 (kusto) 中的行到列
【发布时间】：2021-08-24 12:57:34
【问题描述】：

我有一个简单的查询：

let startDate = ago(7d);
let endDate = now();
let all_logs = materialize(MyTable | where TIMESTAMP > startDate and TIMESTAMP < endDate | where EventName == "SessionResult");
all_logs
| summarize 
Total_Sessions = count(),
Successful_Sessions = countif(Successful == "True"),
Failed_Sessions = countif(Successful == "False")
| extend Success_Rate = round(100.0*Successful_Sessions/Total_Sessions, 2)

如何将其更改为：

标签计数率

总会话数 98 100

Successful_session 96 97.96

Failed_session 2 2.04

最好不使用枢轴插件

【问题讨论】：

标签： azure-data-explorer kql

【解决方案1】：

您可以尝试使用narrow() 插件：https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/narrowplugin

例如：

let T = materialize(
    MyTable 
    | where TIMESTAMP > startDate and TIMESTAMP < endDate
    | where EventName == "SessionResult")
    | summarize 
         Total_Sessions = count(),
         Successful_Sessions = countif(Successful == "True"),
         Failed_Sessions = countif(Successful == "False")
)
;
let total = toscalar(T | project total_sessions)
;
T
| evaluate narrow()
| project Label = Column, Count = Value, Rate = round(100.0 * tolong(Value) / total, 2)

【讨论】：