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
MySQL: An Introduction to the World's Most Popular Database
Apr 12, 2025 am 12:18 AM
MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.
How to open phpmyadmin
Apr 10, 2025 pm 10:51 PM
You can open phpMyAdmin through the following steps: 1. Log in to the website control panel; 2. Find and click the phpMyAdmin icon; 3. Enter MySQL credentials; 4. Click "Login".
MySQL's Place: Databases and Programming
Apr 13, 2025 am 12:18 AM
MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen
Why Use MySQL? Benefits and Advantages
Apr 12, 2025 am 12:17 AM
MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.
How to connect to the database of apache
Apr 13, 2025 pm 01:03 PM
Apache connects to a database requires the following steps: Install the database driver. Configure the web.xml file to create a connection pool. Create a JDBC data source and specify the connection settings. Use the JDBC API to access the database from Java code, including getting connections, creating statements, binding parameters, executing queries or updates, and processing results.
How to start mysql by docker
Apr 15, 2025 pm 12:09 PM
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
MySQL's Role: Databases in Web Applications
Apr 17, 2025 am 12:23 AM
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.
How to install mysql in centos7
Apr 14, 2025 pm 08:30 PM
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
