I have a mongodb collection like:
db.kids.find()
//results
[
{name:'tom', age:10},
{name:'alice', age:12},
....
]
I need a query to get MAX 'age' from this collection
like in SQL: SELECT MAX(age) FROM kids WHERE 1
db.collection.find().sort({age:-1}).limit(1) // for MAX
db.collection.find().sort({age:+1}).limit(1) // for MIN
it's completely usable but i'm not sure about performance