CouchDB installation and use

CouchDB is a document oriented NoSQL database that uses JSON format to store data and supports a distributed and replicable architecture. The following is a detailed introduction to the installation and usage process of CouchDB. Install CouchDB: 1. Download the installation package: on the official website of CouchDB（ https://couchdb.apache.org/ ）Download the installation package suitable for your operating system. 2. Install software: Run the installation package, follow the prompts to install, select the directory and configuration options you want to install. 3. Start the service: After the installation is completed, start the CouchDB service. On Windows, this can be done by finding CouchDB in the start menu and clicking the "Start" button. On Linux, you can start the service using the following command: sudo systemctl start couchdb 4. Access the management interface of CouchDB: Access it in a web browser http://localhost:5984/_utils/ You can view the management interface of CouchDB. Create a data table: 1. Open the CouchDB management interface and click on the "Databases" link in the left navigation bar. 2. Enter a new database name in the "Create Database" text box, and then click the "Create" button. Data insertion: 1. In the "Documents" section, click the "Create Document" button. 2. Select "Empty Document" from the "Template" drop-down menu, and then click the "Create Document" button. 3. In the "JSON document" editor, enter the document data to be inserted, and then click the "Create Document" button. Data modification: 1. In the "Documents" section, locate the document that needs to be modified and click on its "_id" connection. 2. Modify the document data in the "JSON document" editor, and then click the "Save Document" button. Data Query: 1. Use the 'All Documents' page to query all documents. In the "Documents" section, click on the "All Documents" link. 2. You can use the "Startkey", "Endkey", or "Key" parameters as needed to filter the query results. Data deletion: On the "All Documents" page, locate the document you want to delete and click on its "_id" connection. 2. On the document page, click the "Delete Document" button, and then click "Yes" in the confirmation dialog box. The above is a detailed introduction to the installation and usage process of CouchDB. Please note that CouchDB also provides more functions and options, such as views, replication, etc., which can be further studied and practiced according to specific needs.