MongoDB
C100DBA · Question #29
Consider the following document from the products collection: What does the following query using $elemMatch return? db.products.find( { product_code: "345678" }, { variations: { $elemMatch: { size: ^
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MongoDB Fundamentals
Question
Consider the following document from the products collection:
What does the following query using $elemMatch return? db.products.find( { product_code:
"345678" }, { variations: { $elemMatch: { size: ^L^ } } } )
Exhibit
Options
- AReturns the complete document but retrieves only the size field from the array
- BReturns the document but with only one element in the variations array (corresponding to size L)
- CReturns the complete document since MongoDB does not support partial array retrieval
- DReturns the complete document but retrieves only the size field from the array and also with only
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Topics
#$elemMatch#array projection#find projection#query operators