MongoDB update and delete records with examples

Question: How to Update Single Record? (Even Multiple Found)

db.players.update({"age":29},{$set:{number:1000}})

It will delete single record.
Output

WriteResult({"nMatched":1,"nUpserted":0,"nModified":1})

Question: How to update Update multiple Record? - 1 way

db.players.update({"age":29},{$set:{number:100}},{multi:true})

It will delete multiple record.
Output

WriteResult({
  "acknowledged": true,
  "matchedCount": 3,
  "modifiedCount": 3
})

Question: How to Update multiple Record? - 2 Way

db.players.updateMany({"age":29},{$set:{number:135}})

Output

WriteResult({
  "acknowledged": true,
  "matchedCount": 3,
  "modifiedCount": 3
})

Question: How to remove a Record(s)?

db.players.remove({"_id" : ObjectId("57ce95da8a12a77c41313adc")});

Will Delete all the record with matched condition.
Output

WriteResult({"nRemoved":1})

Question: How to remove a Record(s) with limit?

db.players.remove({"age":30},2);

It will deleted only 2 records.
Output

WriteResult({"nRemoved":2})

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