Mongo Group by Month Query Example

query.js

   const match = {
     $group: {
       _id: { month: { $month: '$createdAt' } },
       count: { $sum: 1 },
     },
   };
   const group = {
     $group: {
       _id: null,
       patient: { $push: { month: '$_id.month', count: '$count' } },
     },
   };
   return Zone.aggregate([match, group]);