How to get started with MongoDB
Today, I will talk to you about how to get started with MongoDB. Many people may not know much about it. In order to make you understand better, the editor has summarized the following contents for you. I hope you can get something from this article.
NoSQL non-relational database
MongoDB is a database based on distributed file storage. Written in C++ language. Designed to provide scalable high-performance data storage solutions for WEB applications.
MongoDB is a product between relational database and non-relational database, which is the most functional and most like relational database in non-relational database.
MongoDB stores the data as a document, and the data structure consists of key-value (key= > value) pairs. MongoDB documents are similar to JSON objects. Field values can contain other documents, arrays, and document arrays.
Configuration step
1: under the installation path, create a db folder under data to store data.
2: then perform the next two steps
3: open a command line window under the bin file and you can connect to the MongoDB database.
Open a command line window under the bin folder, and enter the command to export the database collection as a CSV file:
Mongoexport-d mydb-c test-- csv-f name,sex,grade-o test.csv
-d: database
-c: table data
-f: indicates the field to be exported
Python writes data to MongoDB:
Import pymongoclient = pymongo.MongoClient ('localhost',27017) # Connect to database mydb = client [' mydb'] # create database test = mydb ['test'] # create table test.insert_one ({' name':' Tao Lilan', 'sex':' girls', 'grade':520}) # write data collection
The database data is shown in the figure:
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