How to start transactions in Mysql data table
This article mainly introduces to you How to open transactions in the mysql data table.
Mysql transaction is the smallest indivisible unit of work. Usually a transaction corresponds to a complete business, and there are two methods for processing transactions. Simply put, they are manual transactions and automatic transactions. Regarding the definition and basic knowledge of mysql transactions, I have already introduced it to you in the previous article. Friends who need it can refer to it first.
【What does transaction mean in mysql data table】
Then the opening of manual transaction, as the name implies, requires us to actively open or close it ourselves.
How to open a transaction in mysql?
Below we will introduce in detail mysql manual transaction opening with a simple example.
First we connect to the database test and query the money table. The data in the table is as follows:
As shown in the money data table, there are two pieces of data. Here we can assume that the people with id 1 and 2 have 2000 and 2000 respectively. 3000 salary.
Then we start the transaction through the sql statement that opens the transaction.
The basic syntax for opening a transaction is as follows:
start transaction;
Then perform some update operations on the data. For example, the person with ID 1 lends 1,000 yuan to the person with ID 2, then the specific operation process is as follows: The query results are shown in the figure below.
Finally, we can check whether the data in the data table has changed through Navicat. The result is as shown in the figure below:
As you can see from the picture, the actual data in the money table has not changed at all! This is because , when we start a transaction and then perform a series of data updates and other operations, the updated data will not be written directly to the database, but will exist in our transaction log. We only have to The real data in the database will be changed only when the transaction is committed or rolled back. Then in the later articles, we will continue to explain the relevant knowledge of transaction submission and rollback. You can continue to pay attention to the latest courses on the PHP Chinese website.
This article is an introduction to the relevant knowledge about manual transaction opening of mysql data table. It is simple and easy to understand. I hope it will be helpful to friends in need!
If you want to know more about mysql, you can follow the PHP Chinese website
, everyone is welcome to refer to and learn!
The above is the detailed content of How to start transactions in Mysql data table. 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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

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

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The process of starting MySQL in Docker consists of the following steps: Pull the MySQL image to create and start the container, set the root user password, and map the port verification connection Create the database and the user grants all permissions to the database

Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.

I encountered a tricky problem when developing a small application: the need to quickly integrate a lightweight database operation library. After trying multiple libraries, I found that they either have too much functionality or are not very compatible. Eventually, I found minii/db, a simplified version based on Yii2 that solved my problem perfectly.

The key to installing MySQL elegantly is to add the official MySQL repository. The specific steps are as follows: Download the MySQL official GPG key to prevent phishing attacks. Add MySQL repository file: rpm -Uvh https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm Update yum repository cache: yum update installation MySQL: yum install mysql-server startup MySQL service: systemctl start mysqld set up booting

Article summary: This article provides detailed step-by-step instructions to guide readers on how to easily install the Laravel framework. Laravel is a powerful PHP framework that speeds up the development process of web applications. This tutorial covers the installation process from system requirements to configuring databases and setting up routing. By following these steps, readers can quickly and efficiently lay a solid foundation for their Laravel project.

MySQL and phpMyAdmin are powerful database management tools. 1) MySQL is used to create databases and tables, and to execute DML and SQL queries. 2) phpMyAdmin provides an intuitive interface for database management, table structure management, data operations and user permission management.

Installing MySQL on CentOS involves the following steps: Adding the appropriate MySQL yum source. Execute the yum install mysql-server command to install the MySQL server. Use the mysql_secure_installation command to make security settings, such as setting the root user password. Customize the MySQL configuration file as needed. Tune MySQL parameters and optimize databases for performance.
