Five data acquisition methods

There are many ways to collect data. Here are five commonly used methods: 1. Manual collection: a method of copying and pasting the required data by manually browsing the web page. This method is suitable for small data or manual screening, but it is inefficient and easy to make mistakes. 2. Web crawler: Use programming language to write crawler programs, simulate browser behavior, automatically access web pages, and extract required data. This method is suitable for large-scale data acquisition, but it needs some programming ability. 3. Database export: extract the required data from the database through a database query language (such as SQL). This method is suitable for the data already stored in the database, and can quickly obtain a large number of data. 4.API interface call: Get the required data by calling the API interface provided by the website or application. This method is suitable for websites or applications that provide API interfaces, and can realize real-time data acquisition. 5. Data subscription: By subscribing to the data service provided by the data provider, the required data can be obtained. This method is suitable for data providers to provide subscription services, and can obtain real-time updated data. Octopus Collector is an internet data collector with comprehensive functions and simple operation, which can help users quickly collect data from various websites. For more data acquisition methods and skills, please refer to the octopus collector tutorial. For details, please go to official website Tutorial and Help.