Home Database Mysql Tutorial What are the transaction processing techniques for learning MySQL?

What are the transaction processing techniques for learning MySQL?

Jul 30, 2023 pm 10:13 PM
mysql affairs Skill

What are the transaction processing techniques for learning MySQL?

Introduction:
Transaction is a very important concept in database management system. It provides a mechanism to ensure data integrity and consistency. In MySQL, a transaction is the execution unit of a set of SQL statements, which can ensure that all SQL statements in this set of statements are either successfully executed or rolled back if all execution fails. This article will introduce the transaction processing skills of learning MySQL and give corresponding code examples.

  1. Opening a transaction:
    In MySQL, you can use BEGIN, START TRANSACTION or SET AUTOCOMMIT=0 to open a transaction. Among them, BEGIN and START TRANSACTION are equivalent. They will set the autocommit mode to 0, indicating that the automatic commit mode is turned off, that is, the transaction needs to be submitted manually. SET AUTOCOMMIT=0 only turns off the automatic commit mode, and the transaction is not actually started.

Code example:

BEGIN;
-- 或
START TRANSACTION;
-- 或
SET AUTOCOMMIT=0;
Copy after login
  1. Commit transaction:
    In MySQL, you can use the COMMIT statement to submit a transaction. When all SQL statements are executed successfully, we can persist the data to the database through COMMIT.

Code example:

COMMIT;
Copy after login
  1. Rollback transaction:
    In MySQL, you can use the ROLLBACK statement to rollback a transaction. When an error occurs during execution, or previous operations need to be undone, ROLLBACK can be used to roll back the transaction to its previous state.

Code example:

ROLLBACK;
Copy after login
  1. Set save point:
    In MySQL, you can use the SAVEPOINT statement to set a save point, that is, at a certain point during transaction execution Create a mark point at a time point to facilitate rolling back to that time point in subsequent operations. Use the ROLLBACK TO statement to roll back to a savepoint.

Code example:

SAVEPOINT savepoint1;
-- 执行一些SQL操作
ROLLBACK TO savepoint1;
Copy after login
  1. Set transaction isolation level:
    In MySQL, you can control data visibility during concurrent operations by setting the isolation level of a transaction and concurrent performance. MySQL supports four isolation levels: READ UNCOMMITTED, READ COMMITTED, REPEATABLE READ and SERIALIZABLE. You can use the following statement to set the transaction isolation level:

Code example:

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
-- 或
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
-- 或
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
-- 或
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
Copy after login
  1. Use of locks:
    In MySQL, concurrent access can be controlled through the lock mechanism and modify data. Locks can be divided into shared locks and exclusive locks. A shared lock allows other transactions to acquire shared locks and can hold multiple shared locks at the same time; an exclusive lock cannot acquire any locks when held by one transaction.

Code sample:

-- 获取共享锁
SELECT * FROM table_name WHERE column_name = 'value' FOR SHARE;
-- 获取排他锁
SELECT * FROM table_name WHERE column_name = 'value' FOR UPDATE;
Copy after login
  1. Exception handling:
    During transaction processing, various exceptions may be encountered. In order to ensure the integrity and stability of transactions, we need exception handling. In MySQL, exceptions can be defined using the DECLARE statement and caught and handled using the HANDLER statement.

Code example:

DECLARE my_error CONDITION FOR SQLSTATE '45000';
DECLARE CONTINUE HANDLER FOR my_error
BEGIN
    -- 处理异常情况
END;
Copy after login

Conclusion:
By learning MySQL transaction processing skills, we can effectively ensure the integrity and consistency of data, and improve the efficiency of database processing Concurrency performance. It should be noted that transaction processing needs to be used with caution to avoid data inconsistency or deadlock.

The above is the detailed content of What are the transaction processing techniques for learning MySQL?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

MySQL: Simple Concepts for Easy Learning MySQL: Simple Concepts for Easy Learning Apr 10, 2025 am 09:29 AM

MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.

How to open phpmyadmin 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: An Introduction to the World's Most Popular Database 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.

Why Use MySQL? Benefits and Advantages 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 use single threaded redis How to use single threaded redis Apr 10, 2025 pm 07:12 PM

Redis uses a single threaded architecture to provide high performance, simplicity, and consistency. It utilizes I/O multiplexing, event loops, non-blocking I/O, and shared memory to improve concurrency, but with limitations of concurrency limitations, single point of failure, and unsuitable for write-intensive workloads.

MySQL and SQL: Essential Skills for Developers MySQL and SQL: Essential Skills for Developers Apr 10, 2025 am 09:30 AM

MySQL and SQL are essential skills for developers. 1.MySQL is an open source relational database management system, and SQL is the standard language used to manage and operate databases. 2.MySQL supports multiple storage engines through efficient data storage and retrieval functions, and SQL completes complex data operations through simple statements. 3. Examples of usage include basic queries and advanced queries, such as filtering and sorting by condition. 4. Common errors include syntax errors and performance issues, which can be optimized by checking SQL statements and using EXPLAIN commands. 5. Performance optimization techniques include using indexes, avoiding full table scanning, optimizing JOIN operations and improving code readability.

MySQL's Place: Databases and Programming 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

Monitor Redis Droplet with Redis Exporter Service Monitor Redis Droplet with Redis Exporter Service Apr 10, 2025 pm 01:36 PM

Effective monitoring of Redis databases is critical to maintaining optimal performance, identifying potential bottlenecks, and ensuring overall system reliability. Redis Exporter Service is a powerful utility designed to monitor Redis databases using Prometheus. This tutorial will guide you through the complete setup and configuration of Redis Exporter Service, ensuring you seamlessly build monitoring solutions. By studying this tutorial, you will achieve fully operational monitoring settings

See all articles