You can use the $or operator in MongoDB to query for documents that meet one of multiple criteria. This operator uses the…
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MongoDB: How to Use the AND ($and) Operator in Queries
by Tutor AspireYou can use the $and operator in MongoDB to query for documents that meet multiple criteria. This operator uses the following basic…
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How to Rename Fields in MongoDB (3 Examples)
by Tutor AspireYou can use the following methods to rename fields in MongoDB: Method 1: Rename One Field db.collection.updateMany({}, {$rename:{“oldField”:”newField”}}, false, true) Method 2:…
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MongoDB: How to Find Length of String
by Tutor AspireYou can use the following methods to find the length of a string in MongoDB and use this string length in queries:…
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MongoDB: How to Split String into Array of Substrings
by Tutor AspireYou can use the following syntax to split a string into an array of substrings in MongoDB: db.myCollection.aggregate([ { $project: { split_field:…
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MongoDB: How to Use the $susbtr Function
by Tutor AspireYou can use the $substr function in MongoDB to extract a substring from a string. This function uses the following basic syntax:…
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MongoDB: How to Concatenate Strings from Two Fields
by Tutor AspireYou can use the following syntax to concatenate strings from two fields into a new field in MongoDB: db.myCollection.aggregate([ { $project: {…
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How to Replace Strings in MongoDB (With Example)
by Tutor AspireYou can use the following syntax to replace a specific string in a field in MongoDB: db.myCollection.updateMany( { fieldName: { $regex: /old/…
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MongoDB: How to Calculate the Sum of a Field
by Tutor AspireYou can use the following methods to calculate the sum of values in a field in MongoDB: Method 1: Calculate Sum of…
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MongoDB: How to Select a Random Sample of Documents
by Tutor AspireYou can use the following syntax to select a random sample of documents from a collection in MongoDB: db.myCollection.aggregate([ { $sample: {…