Dot notation vs. $elemMatch

Question

I have a unitScores collection, where each document has an id and an array of documents like this:

\"_id\": ObjectId(\"52134edd5b1c2bb503000001\"),
\"scores\         


        

Answer 1

$elemMatch is not the same logic as dot notation. $elemMatch requires the same nested elements to have the values. Using dot notation allows for any nested elements to have an values. Thus, your seeing different results because the query logic is different.