Kusto 仅投影非空值或删除具有空值的列

Question

当我查询时，我得到一行，其中有多个空值。有没有办法在结果中不获取空值，或者删除具有空值的列？

示例代码为：

let table_name = datatable(name:string, date_part:datetime, job_1:string, job_2:string, job_3:string, job_4:string)
[
     "David", datetime(2022-05-9), "Architect", "", "", "Engineer"
  
];
table_name 
|where name == "David" and (date_part  between (now() .. -10d))
|project  (job_1),(job_2),(job_3),(job_4)

谢谢！

Answer 1

let table_name = datatable(name:string, date_part:datetime, job_1:string, job_2:string, job_3:string, job_4:string)
[
     "David", datetime(2022-05-9), "Architect", "", "", "Engineer"
    ,"David", datetime(2022-05-6), "Musician", "Producer", "", ""
];
table_name 
| where name == "David" and (date_part  between (now() .. -10d))
| project-keep job_*
| evaluate narrow()
| where isnotempty(Value)
| evaluate pivot(Column, any(Value), Row)
| project-away Row

job_1	job_2	job_4
Architect		Engineer
Musician	Producer

Fiddle

Kusto 仅投影非空值或删除具有空值的列

Kusto project only non null values or drop columns with null values

azure-data-explorer

kql