Discuss MongoDB MongoDB is an open-source document database and leading NoSQL database. MongoDB is written in C++. This tutorial will give you great understanding on MongoDB concepts needed to create and deploy a highly scalable and performance-oriented database. Khóa học lập trình tại Toidayhoc vừa học vừa làm dự án vừa nhận lương: Khóa học […]
Category Archives: mongodb
MongoDB – Regular Expression Regular Expressions are frequently used in all languages to search for a pattern or word in any string. MongoDB also provides functionality of regular expression for string pattern matching using the $regex operator. MongoDB uses PCRE (Perl Compatible Regular Expression) as regular expression language. Unlike text search, we do not need […]
MongoDB – Map Reduce As per the MongoDB documentation, Map-reduce is a data processing paradigm for condensing large volumes of data into useful aggregated results. MongoDB uses mapReduce command for map-reduce operations. MapReduce is generally used for processing large data sets. MapReduce Command Following is the syntax of the basic mapReduce command − >db.collection.mapReduce( function() […]