Description: The addFields stage in MongoDB is a powerful tool within the aggregation pipeline that allows developers and data analysts to enrich existing documents by adding new fields. This functionality is particularly useful when there is a need to transform or extend the information contained in documents without modifying the original database structure. By using addFields, derived values can be calculated, data from different fields can be combined, or simply additional information that may be relevant for later analysis can be added. This stage does not alter the original documents but produces a new version of each document with the specified additional fields. The flexibility of addFields allows users to perform complex operations efficiently, facilitating the manipulation and analysis of large volumes of data across various applications. In summary, addFields is an essential stage in MongoDB’s aggregation pipeline that enables the creation of richer and more complete documents, thereby optimizing the data analysis process.
