Question

Select Top 10 a, b from users
equivalent sql query in MONGODB

As a part of jqgrid functionality to save the json data and retrieve json data from the DB, I needed this simple SQL query in MONGODB.

Answer 1

.limit()

Example:

db.things.find().limit(10)

Documentation:
http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%7B%7Blimit%28%29%7D%7D

As per the comment below, technically, you’d want to sort the collection too, so it would be:

db.things.find().sort({someField:1}).limit(10)