Operations in MongoDB

You can use the following methods to rename fields in MongoDB: Method 1: Rename One Field db.collection.updateMany({}, {$rename:{“oldField”:”newField”}}, false, true) Method 2:…

You can use the following methods to find the length of a string in MongoDB and use this string length in queries:…

You can use the following syntax to split a string into an array of substrings in MongoDB: db.myCollection.aggregate([ { $project: { split_field:…

You can use the $substr function in MongoDB to extract a substring from a string. This function uses the following basic syntax:…

You can use the following syntax to concatenate strings from two fields into a new field in MongoDB: db.myCollection.aggregate([ { $project: {…

You can use the following syntax to replace a specific string in a field in MongoDB: db.myCollection.updateMany( { fieldName: { $regex: /old/…

You can use the following syntax to insert a document into a collection in MongoDB only if it doesn’t already exist: db.teams.update(…

You can use the $round operator in MongoDB to round numeric values to a certain number of decimal places. This operator uses…

You can use the following methods to check if a field exists in a collection in MongoDB: Method 1: Check if Field…

You can use the following syntax to list all field names in a collection in MongoDB: Object.keys(db.myCollection.findOne()) This particular example lists every…