Explanation: Box 1: No User.name is a property. Box 2: Yes Box 3: Yes The coalesce() function evaluates a list of expressions and returns the first non-null (or non- empty for string) expression. Reference: https://docs.microsoft.com/en-us/composer/concept-language-generation https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/coalescefunction