db.posts.find()

//Show all records

db.users.find()

​

//Show specific records

db.users.find({firstName:"Hazrat"})

//use of $and

//Show specific records that match 2 fields.

db.users.find({

    $and:[

        {firstName:"Hazrat"},

        {lastName:"Umar"}

    ]

})

//use of $or

//Show specific records that optionally match 2 fields.

db.users.find({

    $or:[

        {firstName:"Hazrat"},

        {lastName:"Umar"}

    ]

})

To find one document in MongoDB using the findOne method,

you can use the following code in Node.js:

​

const result = await yourCollection.findOne({ yourQuery });

​

Here 'yourCollection' is the actual name of your MongoDB collection and 

'yourQuery' is the criteria you want to search for in the document.

​

itemsCollection.findOne(query, projection)

  .then(result => {

    if(result) {

      console.log(`Successfully found document: ${result}.`);

    } else {

      console.log("No document matches the provided query.");

    }

    return result;

  })

  .catch(err => console.error(`Failed to find document: ${err}`));