KQL/Kusto distinct、extend 和 project 问题

Question

如果您想在项目或扩展运算符之后使用命令 distinct 和 distinct count，我真的不明白这是什么问题。

let planting_table = ['events.all'] 
    | where FullName_Name == "plant_seed" 
    | extend SeedName = EventData.Payload.SeedName,
        OasisName = EventData.Payload.OasisName,
        TileName = EventData.Payload.TileName
    | project-away SchemaVersion, FullName_Namespace, Entity_Id, Entity_Type,
        EntityLineage_title, EventData, EntityLineage_title_player_account,
        EntityLineage_namespace, ExperimentVariants, FullName_Name
    | project-rename id = EntityLineage_master_player_account
;
planting_table
| summarize dcount(SeedName) by id

我的目标是在 Kusto/KQL 中按 ID 对种子名称进行不同计数。我怎样才能做到这一点？为什么我不能在 extend 或 project operator 之后使用 distinct？

感谢您的帮助！

Answer 1

尝试使用 tostring() 函数将名为 SeedName 的 dynamic 属性转换为 string，以便您可以使用 distinct 运算符.

即

...
| extend SeedName = tostring(EventData.Payload.SeedName),
...
| summarize dcount(SeedName) by id

KQL/Kusto distinct、extend 和 project 问题

Issue with KQL / Kusto distinct, extend and project

project

distinct

extend

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