https://github.com/janani2311/mongodb-day2-task

https://github.com/janani2311/mongodb-day2-task

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• Host: GitHub
• URL: https://github.com/janani2311/mongodb-day2-task
• Owner: Janani2311
• Created: 2024-07-18T09:48:14.000Z (11 months ago)
• Default Branch: main
• Last Pushed: 2024-07-18T13:28:32.000Z (11 months ago)
• Last Synced: 2025-02-03T20:50:35.909Z (4 months ago)
• Size: 142 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
MongoDB Task

Designed a database as Zen class programme and created the following collections:

  - users

  -codekata

  -attendance

  -topics

  -tasks

  -company_drives

  -mentors

Following are the Queries for the corresponding questions:

1. Find all the topics and tasks which are thought in the month of October.

        Query: db.topics.aggregate([{

                $lookup:

                {from:'tasks',

                	localField:'_id',

                	foreignField:'topic_id',

                	as:'taskDetails'

                }},{$match:{ $and: [ { date: { $gte: new Date("2020-10-15")}},{ date:{$lte: new Date("2020-10-30") }} ]}

                },{ $project : { _id : 0 } }])

 

2. Find all the company drives which appeared between 15 oct-2020 and 31-oct-2020.

        Query:  db.company_drives.find({ $and: [ { date: { $gte: new Date("2020-10-15")}},{ date:{$lte: new Date("2020-10-30") }} ]},{_id:0,selected:0})

3. Find all the company drives and students who are appeared for the placement.

       Query: db.company_drives.find({},{_id:0,date:0})

   

4. Find the number of problems solved by the user in codekata.

       Query: db.codekata.find({},{_id:0})

   

5. Find all the mentors with who has the mentee's count more than 15.

       Query: db.mentors.find({mentee_count:{$gt:15}})

   

6. Find the number of users who are absent and task is not submitted  between 15 oct-2020 and 31-oct-2020.

        Query: db.attendance.aggregate(

                  [

                    {

                      $lookup: {

                        from: 'tasks',

                        localField: 'topic_id',

                        foreignField: 'topic_id',

                        as: 'task_details'

                      }

                    },

                { $unwind: '$task_details' },

                {  $match: {

                        'task_details.due_date': {

                          $gte: '2020-10-15',

                          $lte: '2020-10-31'

                        }

                }},

                {

                $project:

                  {_id:0,topic_id:1,absent:1,'task_details.due_date':1,'task_details.submitted_users':1}

                

                }

                

                ])

      Collections, Queries and the corresponding outputs are submitted in a word file.