php实现mysql事务处理的方法,phpmysql事务处理
php实现mysql事务处理的方法,phpmysql事务处理
本文实例讲述了php实现mysql事务处理的方法。分享给大家供大家参考。具体分析如下:
要实现本功能的条件是环境 mysql 5.2 /php 5 支持事务的table 类型,需要InnoDB,有了这些条件你就可以做上面的实现了,这个事物回滚操作是大项目经常用到的,像银行,电子商务等都会用到,有需要的朋友可以参考一下.
近期项目软件升级到支持事务处理,做个示例供大家学习参考.
环境 mysql 5.2 /php 5
支持事务的table 类型 需要InnoDB
php mysql 事务处理实现程序代码如下:
复制代码 代码如下:
$LinkID =mysql_connect('localhost:3307','root',*******);
mysql_select_db('web_his',$LinkID);
mysql_query("set names utf8");
/* 创建事务 */
mysql_query('START TRANSACTION') or exit(mysql_error());
$ssql1="insert into pf_item values('22','我们','30')"; //执行sql 1
if(!mysql_query($ssql1)){
echo $ssql1.mysql_errno().":".mysql_error()."
";
mysql_query('ROLLBACK') or exit(mysql_error());//判断当执行失败时回滚
exit;
}
$ssql1="insert into pf_item values('21','hell','10')"; //执行sql 2
if(!mysql_query($ssql1)){
echo $ssql1.mysql_errno().":".mysql_error()."
";
mysql_query('ROLLBACK') or exit(mysql_error());//判断当执行失败时回滚
exit;
}
mysql_query('COMMIT') or exit(mysql_error());//执行事务
mysql_close($LinkID);
?>
希望本文所述对大家的php程序设计有所帮助。

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



In MySQL database, the relationship between the user and the database is defined by permissions and tables. The user has a username and password to access the database. Permissions are granted through the GRANT command, while the table is created by the CREATE TABLE command. To establish a relationship between a user and a database, you need to create a database, create a user, and then grant permissions.

Data Integration Simplification: AmazonRDSMySQL and Redshift's zero ETL integration Efficient data integration is at the heart of a data-driven organization. Traditional ETL (extract, convert, load) processes are complex and time-consuming, especially when integrating databases (such as AmazonRDSMySQL) with data warehouses (such as Redshift). However, AWS provides zero ETL integration solutions that have completely changed this situation, providing a simplified, near-real-time solution for data migration from RDSMySQL to Redshift. This article will dive into RDSMySQL zero ETL integration with Redshift, explaining how it works and the advantages it brings to data engineers and developers.

MySQL database performance optimization guide In resource-intensive applications, MySQL database plays a crucial role and is responsible for managing massive transactions. However, as the scale of application expands, database performance bottlenecks often become a constraint. This article will explore a series of effective MySQL performance optimization strategies to ensure that your application remains efficient and responsive under high loads. We will combine actual cases to explain in-depth key technologies such as indexing, query optimization, database design and caching. 1. Database architecture design and optimized database architecture is the cornerstone of MySQL performance optimization. Here are some core principles: Selecting the right data type and selecting the smallest data type that meets the needs can not only save storage space, but also improve data processing speed.

1. Use the correct index to speed up data retrieval by reducing the amount of data scanned select*frommployeeswherelast_name='smith'; if you look up a column of a table multiple times, create an index for that column. If you or your app needs data from multiple columns according to the criteria, create a composite index 2. Avoid select * only those required columns, if you select all unwanted columns, this will only consume more server memory and cause the server to slow down at high load or frequency times For example, your table contains columns such as created_at and updated_at and timestamps, and then avoid selecting * because they do not require inefficient query se

View the MySQL database with the following command: Connect to the server: mysql -u Username -p Password Run SHOW DATABASES; Command to get all existing databases Select database: USE database name; View table: SHOW TABLES; View table structure: DESCRIBE table name; View data: SELECT * FROM table name;

Detailed explanation of database ACID attributes ACID attributes are a set of rules to ensure the reliability and consistency of database transactions. They define how database systems handle transactions, and ensure data integrity and accuracy even in case of system crashes, power interruptions, or multiple users concurrent access. ACID Attribute Overview Atomicity: A transaction is regarded as an indivisible unit. Any part fails, the entire transaction is rolled back, and the database does not retain any changes. For example, if a bank transfer is deducted from one account but not increased to another, the entire operation is revoked. begintransaction; updateaccountssetbalance=balance-100wh

To fill in the MySQL username and password: 1. Determine the username and password; 2. Connect to the database; 3. Use the username and password to execute queries and commands.

Copy and paste in MySQL includes the following steps: select the data, copy with Ctrl C (Windows) or Cmd C (Mac); right-click at the target location, select Paste or use Ctrl V (Windows) or Cmd V (Mac); the copied data is inserted into the target location, or replace existing data (depending on whether the data already exists at the target location).
