How to write Kusto query to get results in one table? - azure-data-explorer

Question

I have 2 KQL queries and I want to combine them in order to display two rows as one result. Not just result of first query, then result of second query:
R_CL
| where isnotempty(SrcIP_s)
| project Message
| take 1;
R_CL
| where isempty(SrcIP_s)
| project Message
| take 1
See sample R_L below.I would like to see 2 rows as result, one with SrcIP_s not empty, and the second with SrcIP_s empty (in this case it will be always same one)
let R_CL = datatable ( SrcIP_s:string, Message:string)
["1.1.1.1" ,"one",
"" ,"two",
"2.2.2.2","three",
"3.3.3.3","four"];
R_CL
| project SrcIP_s, Message

Answer 1

A simple solution for this would be to use the union operator like this:
let query1 = R_CL
| where isnotempty(SrcIP_s)
| project Message
| take 1;
let query2 = R_CL
| where isempty(SrcIP_s)
| project Message
| take 1;
query1
| union query2;

Answer 2

I know this is an old request - but here's a sample query using views and a union for your single query:
Your two separate queries...
R_CL
| where isnotempty(SrcIP_s)
| project Message
| take 1;
R_CL
| where isempty(SrcIP_s)
| project Message
| take 1
would become:
let Query1 = view () {
R_CL
| where isnotempty(SrcIP_s)
| project Message
| take 1;
};
let Query2 = view () {
R_CL
| where isempty(SrcIP_s)
| project Message
| take 1
};
union withsource="TempTableName" Query1, Query2