[Python Advanced Tutorial 11] PyMySQL database connection

1. Database connection

Database connection refers to establishing a connection between a program and a database in programming so that database-related operations can be performed in the program. A database connection usually involves the following steps:

1. Importing database modules: First, you need to import database-related modules. Different databases have different modules. For example, you can import modules when using SQLite databases in Python, and import modules sqlite3when using MySQL databases mysql.connector.

2. Establish a connection: use the function or method provided by the module to establish a connection with the database. This step specifies information such as the address of the database, user name, password, and the name of the database to be connected.

3. Create a cursor object: After establishing a connection, you need to create