How can I paginate the data while sorting it in MongoDB?

edit

To paginate the data while sorting it in MongoDB, you can use the skip() and limit() methods along with the sort() method. Here is an example:

Let's say you have a collection named users with the following documents:

{ "_id": 1, "name": "Alice", "age": 30 }
{ "_id": 2, "name": "Bob", "age": 25 }
{ "_id": 3, "name": "Charlie", "age": 35 }
{ "_id": 4, "name": "Dave", "age": 40 }

To paginate the data while sorting it by age in ascending order, you can use the following query:

db.users.find().sort({age: 1}).skip(2).limit(2)

This will skip the first two documents and return the next two documents sorted by age in ascending order:

{ "_id": 1, "name": "Alice", "age": 30 }
{ "_id": 4, "name": "Dave", "age": 40 }

Here, skip(2) skips the first two documents and limit(2) limits the result to two documents. The sort({age: 1}) sorts the documents by age in ascending order.

Note that if you have a large collection, using skip() can be inefficient as it has to scan all the skipped documents. In that case, you can use the $gt operator to specify the last document seen and the limit() method to limit the number of documents returned. For example:

db.users.find({_id: {$gt: last_id}}).sort({age: 1}).limit(2)

Here, last_id is the _id of the last document seen in the previous page. The query returns the next two documents sorted by age in ascending order.