conditional columns

[nExoR nExoiS]

if there a way to project/extend columns conditionally? 

scenario: 

i want to make a resource query by name, and show some additional information based on resource type.

any hints?

[#2]

@nExoR nExoiS 

I think you might create a new column with iif. Here's an example using the StormEvents table:

StormEvents

| where State =="CALIFORNIA"
| distinct EventType, State
| extend ItNeverRainsInCalifornia = iif(EventType =="Heavy Rain" and State =="CALIFORNIA", "it pours, man it pours", "") //if-then-else - else is left blank in this example

[#3]

thanks! i'm using similar logic now, i was hoping for some method to NOT have columns instead of having empty columns. this logic means, that for each object there will be multiple, unnecessary, empty columns for objects of a different type...

anyway - thx for confirming.

[#4]

this would simple replace "Heavy Rain" in the existing column EventType by the String "it pours".

StormEvents
| where State =="CALIFORNIA"
| distinct EventType, State
| extend EventType = iif(EventType =="Heavy Rain" and State =="CALIFORNIA", "it pours",EventType)

[#5]

yes, exactly - but the column name is static, non-meaningful.

i will need to better understand distinct https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/distinctoperator
thx for the hint