MongoDB installation and use

MongoDB is a non relational database that stores data in BSON (Binary JSON) format, with high scalability and flexibility. The following will provide a detailed introduction to the installation process of MongoDB and demonstrate how to create data tables and perform data insertion, modification, query, and deletion operations. Install MongoDB: 1. Download MongoDB: Visit the MongoDB official website（ https://www.mongodb.com/ ）Select the appropriate version of MongoDB for the operating system to download. 2. Install MongoDB: Unzip the downloaded files and add the binary file directory of MongoDB to the system environment variable. Create a data table: 1. Start MongoDB: Open a terminal or command line window and execute the 'mongod' command to start the MongoDB service. 2. Connect to MongoDB: Open a new terminal or command line window, and execute the 'mongo' command to connect to MongoDB. 3. Create a database: Execute the 'use<database name>' command to create a new database, such as' use mydb '. 4. Create a data table: Execute the 'db. createCollection ('Table Name>') 'command to create a new data table, such as' db. createCollection ('users')'. Data insertion: 1. Select a data table: Execute the 'use<database name>' command to select the database to operate on, such as' use mydb '. 2. Insert Data: Execute ` db< Table name>. insertOne (<document>) 'command inserts a piece of data, such as' db. users. insertOne ({name:' Alice ', age: 25})'. Data modification: 1. Select a data table: Execute the 'use<database name>' command to select the database to operate on, such as' use mydb '. 2. Modify data: Execute ` db< Table Name>. updateOne (<Condition>,<Update>) 'Command to modify a piece of data, such as' db. users. updateOne ({name:'Alice'}, {$set: {age: 26}) '. Data Query: 1. Select a data table: Execute the 'use<database name>' command to select the database to operate on, such as' use mydb '. 2. Query data: Execute ` db< Table name>. find (<condition>) 'Command to query data, such as' db. users. find ({name:' Alice '})'. Data deletion: 1. Select a data table: Execute the 'use<database name>' command to select the database to operate on, such as' use mydb '. 2. Delete data: Execute ` db< The command '. deleteOne (<condition>)' deletes a piece of data, such as' db. users. deleteOne ({name:'Alie '})'. The above is the basic installation and usage introduction of MongoDB. Through these operations, data insertion, modification, query, and deletion can be achieved.