2

To remove some properties, exclude a Column from SharePoint Search Crawl for your reference: https://www.sharepointdiary.com/2014/02/exclude-column-from-sharepoint-search-crawl.html


2

Set your Query Transform to {searchTerms} (Path:http://Catalog OR Path:http://news OR Path:http://blog) As for removing properties, you can customize search results display template but KQL will return all specified searchable columns.


1

If you are using list column, you need to map the related crawled property to built in managed property(or create a new managed property)in search schema: After mapping it to a valid built in managed property,wait for a while,or you could create a site column and add it to your library,fill in values, SharePoint will creat the managed property automatically....


1

Maybe you mean this operator: <>


1

The question is too general, so the answer will be very general too. The following two links will help you with what you need: https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/ipv4-lookup-plugin https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/ipv4-is-privatefunction


1

The character '-'(-path:) means Exclusion, I think you should remove it for your query. Check here for Official document.


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