azure-data-explorer - 扩展主表中的列

Question

我想将表 1 扩展为 IsAvailableInTable2 = Yes，如果表 2 的 MonitorId 列中存在与 Id（表 1 中的列）匹配的值。我尝试使用 materialize，但效果不佳。

//Table 1
datatable(Id:string, MetadataKey:string, MetadataValue:string, Key:string, Value:string)
[
    "Restarting", "", "", "", "", 
    "Starting", "", "", "", "", 
    "Failed", "Location", "Monitor", "Routing", "xyz", 
]

//Table 2
datatable(MonitorId:string, Automitigated:long, AlertCount:long)
[
    "Restarting", 94, 94, 
    "Restart", 93, 93, 
    "Failed", 92, 92, 
]

预期结果：

在此处输入图像描述

Answer 1

这应该有效：

// creating the first table. optional, assuming the data is ingested, and not a 'datatable' literal
.set T1 <| datatable(Id:string, MetadataKey:string, MetadataValue:string, Key:string, Value:string)
[
    "Restarting", "", "", "", "", 
    "Starting", "", "", "", "", 
    "Failed", "Location", "Monitor", "Routing", "xyz", 
]


// creating the second table. optional, assuming the data is ingested, and not a 'datatable' literal
.set T2 <| datatable(MonitorId:string, Automitigated:long, AlertCount:long)
[
    "Restarting", 94, 94, 
    "Restart", 93, 93, 
    "Failed", 92, 92, 
]

// query
T1
| extend IsAvailableInTable2 = case(Id in ((T2 | project MonitorId)), "Yes", "No")

ID	元数据密钥	元数据值	钥匙	价值	IsAvailableInTable2
重启					是的
开始					不
失败的	地点	监视器	路由	xyz	是的