How to connect to mysql database
Connecting to the MySQL database requires the following steps: Obtain connection information: server address, port, user name, password, database name. Choose a connection method: You can use a Python library (such as MySQLdb or pymysql) or the command line (such as MySQL). Perform queries and operations: After the connection is established, queries and update operations can be performed. Close connection: After the operation is completed, close the connection to release resources.
How to connect to MySQL database
Step one: Obtain connection information
- Server address: the IP address or host name of the database server
- Port: usually 3306
- Username: the username of the database user
- Password: Database user’s password
- Database name: Name of the database to be connected
Step 2: Select the connection method
-
Use Python library (such as MySQLdb or pymysql):
import mysql.connector # 创建连接对象 conn = mysql.connector.connect( host="127.0.0.1", port=3306, user="username", password="password", database="database_name" )
Copy after login Use command line (such as MySQL):
mysql -h 127.0.0.1 -P 3306 -u username -p password database_name
Copy after login
Step 3: Perform queries and operations
Once the connection is established, you can perform queries and operations using:
-
Execute query:
# 创建游标对象 cursor = conn.cursor() # 执行查询 cursor.execute("SELECT * FROM table_name") # 获取结果 rows = cursor.fetchall() # 关闭游标 cursor.close()
Copy after login Perform update operation:
cursor.execute("UPDATE table_name SET field_name='new_value' WHERE condition") conn.commit()
Copy after login
Step 4: Close the connection
After the operation is completed, please close the connection to release resources:
conn.close()
The above is the detailed content of How to connect to mysql database. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

When using Scapy crawler, the reason why pipeline persistent storage files cannot be written? Discussion When learning to use Scapy crawler for data crawler, you often encounter a...

Choice of Python Cross-platform desktop application development library Many Python developers want to develop desktop applications that can run on both Windows and Linux systems...

Python process pool handles concurrent TCP requests that cause client to get stuck. When using Python for network programming, it is crucial to efficiently handle concurrent TCP requests. ...

Deeply explore the viewing method of Python functools.partial object in functools.partial using Python...

Getting started with Python: Hourglass Graphic Drawing and Input Verification This article will solve the variable definition problem encountered by a Python novice in the hourglass Graphic Drawing Program. Code...

How to handle high resolution images in Python to find white areas? Processing a high-resolution picture of 9000x7000 pixels, how to accurately find two of the picture...

Data Conversion and Statistics: Efficient Processing of Large Data Sets This article will introduce in detail how to convert a data list containing product information to another containing...

Differential analysis of output results of Node.js, Python and Go decryption algorithms This article will provide AES-128-ECB solutions implemented in three different programming languages (Node.js, Python, Go)...
