How To Delete N Numbers Of Documents In Mongodb?

In this post, we will get to know How to Delete N numbers of documents in MongoDB which we can perform using an in- built function dleteMany() where we can also provide the number along with a condition for deleting from the whole collection.

Delete N Documents

Here we are going to see a method to deleting n number of documents from a particular collection for the same we have given an example for showing how we can perform that action and get our thing done as per our choice.

db. collection. delete Many({/* filter criteria */}, function( err, result) {
  if (err) throw err;
  console. log( result. result.n + " document( s) deleted");
});

Here in the Syntax given above, we have used the variable name as and all and for the live example, we have given an example here to understand it better.

db. collection.deleteMany({ status: "inactive" }, function( err, result) {
  if ( err) throw err;
  console.log( result.result.n + " document( s) deleted");
});

In the above example where the delete many()method also takes an optional callback function as its second parameter, which is called when the deletion operation is complete. here we have a callback function that receives two parameters: err which contains any error that occurred during the operation, and a result that contained the result of the number of documents which has been deleted by the above code to get a clear idea of how it works and deleted all.

There are a number of things we need to keep in mind before using it as it may be proven as dangerous as it may lead to the loss of all the data as it is non recoverable removal so give the condition wisely so that the important data shouldn’t be hampered.

There might be taking some time during executing a large query to remove. And if we have indexes in the collection then it may cause too large problems as it may lead to making changes in other executions as the indexes will change.

One of the most important things to keeping mind is we need to keep some permission restrictions for deleting the data as it may be a theft and it will lead to large problems.

 

 

To learn more about How to deleting N numbers of documents in MongoDB visit:  by stack overflow

To learn more about MongoDB solutions to different problems faced in MongoDB along with concepts and tutorials one different topic visit: MongoDB Problems And Tutorials.