Explanation:$limit takes a positive integer that specifies the maximum number of documents to pass along. 7. Which of the following is used to retrieve like SELECT clause in SQL?
A. $reduce
B. $select
C. $project
D. None of the mentioned
Answer:A
Explanation:$limit takes a positive integer that specifies the maximum number of documents to pass along. 7. Which of the following is used to retrieve like SELECT clause in SQL?
A. $reduce B. $select C. $project D. None of the mentioned
Explanation:The $project takes a document that can specify the inclusion of fields, the suppression of the _id field, the addition of new fields, and the resetting the values of existing fields. 8. _______ groups documents by some specified expression and outputs to the next stage a document for each distinct grouping.