MongoDB/Operators at main · PONMANIAN-SA/MongoDB · GitHub

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LOGICAL OPERATORS 😉😉😉
codeio> db.course.find({ $and:[{videos:35},{name:"React"}]})         //$and is syntax write like within square bracket placed it, it work like And operator👈🩵
[
  {
    _id: ObjectId('68d2d5e15ed1a5518ccebea4'),
    name: 'React',
    videos: 35,
    duration: 18.3,
    PublishedDate: ISODate('2025-09-23T00:00:00.000Z'),
    instructors: [ 'Goms', 'Bob' ],
    relatedCourses: { name: 'js', videos: 36, duration: 11 },
    completed: true
  }
]

codeio> db.course.find({ $or:[{videos:35},{name:"React"}]})         //$or ,Same for OR operator👈🧡
[
  {
    _id: ObjectId('68d2cac1488f2d29f7cebea4'),
    name: 'DSA',
    videos: 35,
    duration: 28.5,
    completed: true
  },
  {
    _id: ObjectId('68d2d5e15ed1a5518ccebea4'),
    name: 'React',
    videos: 35,
    duration: 18.3,
    PublishedDate: ISODate('2025-09-23T00:00:00.000Z'),
    instructors: [ 'Goms', 'Bob' ],
    relatedCourses: { name: 'js', videos: 36, duration: 11 },
    completed: true
  }
]

codeio> db.course.find({ $nor:[{videos:35},{name:"React"}]})       //And also same for NOR operator👈💚
[
  {
    _id: ObjectId('68d2cbdb488f2d29f7cebea7'),
    name: 'JAVA',
    videos: 50,
    duration: 10.5,
    completed: true
  },
  {
    _id: ObjectId('68d2cbdb488f2d29f7cebea8'),
    name: 'C++',
    videos: 36,
    duration: 10.51,
    completed: true
  },
  {
    _id: ObjectId('68d2d6615ed1a5518ccebea5'),
    name: 'Mongo DB',
    videos: 15,
    duration: 2.5,
    completed: true
  },
  {
    _id: ObjectId('68d4182cc5e0eb2fcbcebea5'),
    name: 'c++',
    videos: 50,
    duration: 10.5,
    completed: true
  },
  {
    _id: ObjectId('68d5792c74d91a0aa6af9f6c'),
    name: 'Spring Boot',
    duration: 6.7,
    videos: 50
  }
]

👇👇👇👇👇(Recap)
 db.course.find({ $and:[{videos:35},{name:"React"}]})
db.course.find({ $or:[{videos:35},{name:"React"}]})
db.course.find({ $nor:[{videos:35},{name:"React"}]})
💕💕💕💕💕

ARRAY OPRATOR💥💥💥
codeio> db.course.updateOne({name:"React"},{$push:{instructors:"Goms"}})                   //If you insert element in array ,you can use the following operators. $push operator mean that insert element in array🫀
{
  acknowledged: true,
  insertedId: null,
  matchedCount: 1,
  modifiedCount: 1,
  upsertedCount: 0
}

codeio> db.course.find({name:"React"})
[
  {
    _id: ObjectId('68d2d5e15ed1a5518ccebea4'),
    name: 'React',
    videos: 35,
    duration: 18.3,
    PublishedDate: ISODate('2025-09-23T00:00:00.000Z'),
    instructors: [ 'Goms', 'Bob', 'Goms' ],
    relatedCourses: { name: 'js', videos: 36, duration: 11 },
    completed: true
  }
]

codeio> db.course.updateOne({name:"React"},{$addToSet:{instructors:"Goms"}})          //$addToSet means that yis also insert but only difference is it doesn't insert duplicate🩵
{
  acknowledged: true,
  insertedId: null,
  matchedCount: 1,
  modifiedCount: 0,                              //you can see no modified👈
  upsertedCount: 0
}
codeio> db.course.updateOne({name:"React"},{$addToSet:{instructors:"Codeio"}})
{
  acknowledged: true,
  insertedId: null,
  matchedCount: 1,
  modifiedCount: 1,                            //This case no duplicate ,so insert it show modifiedcount =1👈
  upsertedCount: 0
}

codeio> db.course.find({name:"React"})
[
  {
    _id: ObjectId('68d2d5e15ed1a5518ccebea4'),
    name: 'React',
    videos: 35,
    duration: 18.3,
    PublishedDate: ISODate('2025-09-23T00:00:00.000Z'),
    instructors: [ 'Goms', 'Bob', 'Goms', 'Codeio' ],
    relatedCourses: { name: 'js', videos: 36, duration: 11 },
    completed: true
  }
]

codeio> db.course.updateOne({name:"React"},{$pull:{instructors:"Codeio"}})                //$pull means that delete element 💜
{
  acknowledged: true,
  insertedId: null,
  matchedCount: 1,
  modifiedCount: 1,
  upsertedCount: 0
}
codeio> db.course.updateOne({name:"React"},{$pop:{instructors:-1}})                    //$pop use can delete with elements name or give -1 delete 1'st element This opposite is 1 delete last element🤎
{
  acknowledged: true,
  insertedId: null,
  matchedCount: 1,
  modifiedCount: 1,
  upsertedCount: 0
}
codeio> db.course.find({name:"React"})
[
  {
    _id: ObjectId('68d2d5e15ed1a5518ccebea4'),
    name: 'React',
    videos: 35,
    duration: 18.3,
    PublishedDate: ISODate('2025-09-23T00:00:00.000Z'),
    instructors: [ 'Bob', 'Goms' ],
    relatedCourses: { name: 'js', videos: 36, duration: 11 },
    completed: true
  }
]
👇👇👇👇(Recap)
codeio> db.course.updateOne({name:"React"},{$push:{instructors:"Goms"}})
db.course.updateOne({name:"React"},{$addToSet:{instructors:"Goms"}})
db.course.updateOne({name:"React"},{$pull:{instructors:"Codeio"}})
db.course.updateOne({name:"React"},{$pop:{instructors:-1}})
💕💕💕💕