Azure 无法查询AppInsight日志

我正在努力创建一个视觉查询

我想得到一个应用程序启动的次数，然后除以某个事件被触发的次数（拼写检查）

实际上，我有3个应用程序都使用相同的拼写检查功能，我想看看每个应用程序中拼写检查的使用量是否相同

//First, let's get the count of hasBeenUsed (how many times the application has been used) 
let app1Starts =
customEvents
| where timestamp > ago(30d)
| where name == 'hasBeenUsed';
| where customDimensions['payload.appId] == 'app1'
| summarize count(); 
//Now, let's get the count of how many times spellchecking has happened for that specific application
let spellCheckEvents =
customEvents
| where timestamp > ago(30d)
| where name == 'spellchecked';
| where customDimensions['payload.appId] == 'app1'
| summarize count();
//this is where I struggle
customEvents
| summarize app1Starts / spellCheckEvents    //HELP ME PLEASE

我收到了错误信息

“Summary”运算符：未能解析名为“app1Starts”的标量表达式

如果我将最后一行从

summary

更改为

extend

，也会发生同样的情况，您可以在let语句中使用运算符

在您的情况下，查询应该是：

//First, let's get the count of hasBeenUsed (how many times the application has been used) 
let app1Starts =toscalar(
customEvents
| where timestamp > ago(30d)
| where name == 'hasBeenUsed'
| where customDimensions['payload.appId] == 'app1'
| summarize count()); 

//Now, let's get the count of how many times spellchecking has happened for that specific application
let spellCheckEvents =toscalar(
customEvents
| where timestamp > ago(30d)
| where name == 'spellchecked'
| where customDimensions['payload.appId] == 'app1'
| summarize count());

//then you can use the following statement
customEvents
| extend c1=app1Starts/spellCheckEvents