MySQL 存储过程的字符集问题_MySQL
由于存储过程中定义参数时，无法定义其字符集，因此调用存储过程的时候，会默认读取全局变量character_set_server，而且还是只读取mysqld启动时该全局变量的值作为存储过程中默认的传输字符集。因此，如果数据表/字段使用系统默认的字符集(比如latin1)的话，调用存储过程更新一些非英文的字符串字段时，就不会发生问题；但是，如果数据表/字段的字符集不是系统默认的字符集(比如默认是latin1，数据表使用的是utf8)，就会出现问题了。解决办法是：在my.cnf(windows下是my.ini)，增加一行：
default-character-set=utf8
或者
character-set-server=utf8
也可以。如果只是在mysqld启动之后，在 mysql 命令行中用 SET 语法来更新的话则不起作用。
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
Huawei will launch innovative MED storage products next year: rack capacity exceeds 10 PB and power consumption is less than 2 kW
Mar 07, 2024 pm 10:43 PM
This website reported on March 7 that Dr. Zhou Yuefeng, President of Huawei's Data Storage Product Line, recently attended the MWC2024 conference and specifically demonstrated the new generation OceanStorArctic magnetoelectric storage solution designed for warm data (WarmData) and cold data (ColdData). Zhou Yuefeng, President of Huawei's data storage product line, released a series of innovative solutions. Image source: Huawei's official press release attached to this site is as follows: The cost of this solution is 20% lower than that of magnetic tape, and its power consumption is 90% lower than that of hard disks. According to foreign technology media blocksandfiles, a Huawei spokesperson also revealed information about the magnetoelectric storage solution: Huawei's magnetoelectronic disk (MED) is a major innovation in magnetic storage media. First generation ME
Vue3+TS+Vite development skills: how to encrypt and store data
Sep 10, 2023 pm 04:51 PM
Vue3+TS+Vite development tips: How to encrypt and store data. With the rapid development of Internet technology, data security and privacy protection are becoming more and more important. In the Vue3+TS+Vite development environment, how to encrypt and store data is a problem that every developer needs to face. This article will introduce some common data encryption and storage techniques to help developers improve application security and user experience. 1. Data Encryption Front-end Data Encryption Front-end encryption is an important part of protecting data security. Commonly used
How to clear cache on Windows 11: Detailed tutorial with pictures
Apr 24, 2023 pm 09:37 PM
What is cache? A cache (pronounced ka·shay) is a specialized, high-speed hardware or software component used to store frequently requested data and instructions, which in turn can be used to load websites, applications, services, and other aspects of the system faster part. Caching makes the most frequently accessed data readily available. Cache files are not the same as cache memory. Cache files refer to frequently needed files such as PNGs, icons, logos, shaders, etc., which may be required by multiple programs. These files are stored in your physical drive space and are usually hidden. Cache memory, on the other hand, is a type of memory that is faster than main memory and/or RAM. It greatly reduces data access time since it is closer to the CPU and faster compared to RAM
Git installation process on Ubuntu
Mar 20, 2024 pm 04:51 PM
Git is a fast, reliable, and adaptable distributed version control system. It is designed to support distributed, non-linear workflows, making it ideal for software development teams of all sizes. Each Git working directory is an independent repository with a complete history of all changes and the ability to track versions even without network access or a central server. GitHub is a Git repository hosted on the cloud that provides all the features of distributed revision control. GitHub is a Git repository hosted on the cloud. Unlike Git which is a CLI tool, GitHub has a web-based graphical user interface. It is used for version control, which involves collaborating with other developers and tracking changes to scripts and
How to correctly use sessionStorage to protect sensitive data
Jan 13, 2024 am 11:54 AM
How to correctly use sessionStorage to store sensitive information requires specific code examples. Whether in web development or mobile application development, we often need to store and process sensitive information, such as user login credentials, ID numbers, etc. In front-end development, using sessionStorage is a common storage solution. However, since sessionStorage is browser-based storage, some security issues need to be paid attention to to ensure that the stored sensitive information is not maliciously accessed and used.
How do PHP and swoole achieve efficient data caching and storage?
Jul 23, 2023 pm 04:03 PM
How do PHP and swoole achieve efficient data caching and storage? Overview: In web application development, data caching and storage are a very important part. PHP and swoole provide an efficient method to cache and store data. This article will introduce how to use PHP and swoole to achieve efficient data caching and storage, and give corresponding code examples. 1. Introduction to swoole: swoole is a high-performance asynchronous network communication engine developed for PHP language. It can
Understanding artificial intelligence tables in one article: starting with MindsDB
Apr 12, 2023 pm 12:04 PM
This article is reprinted from the WeChat public account "Living in the Information Age". The author lives in the information age. To reprint this article, please contact the Living in the Information Age public account. For students who are familiar with database operations, writing beautiful SQL statements and finding ways to find the data they need from the database is a routine operation. For students who are familiar with machine learning, it is also a routine operation to obtain data, preprocess the data, build a model, determine the training set and test set, and use the trained model to make a series of predictions about the future. So, can we combine the two technologies? We see that data is stored in the database, and predictions need to be based on past data. If we query future data through the existing data in the database, then it is
Full analysis of Java collection framework: dissecting data structure and revealing the secret of efficient storage
Feb 23, 2024 am 10:49 AM
Overview of Java Collection Framework The Java collection framework is an important part of the Java programming language. It provides a series of container class libraries that can store and manage data. These container class libraries have different data structures to meet the data storage and processing needs in different scenarios. The advantage of the collection framework is that it provides a unified interface, allowing developers to operate different container class libraries in the same way, thereby reducing the difficulty of development. Data structures of the Java collection framework The Java collection framework contains a variety of data structures, each of which has its own unique characteristics and applicable scenarios. The following are several common Java collection framework data structures: 1. List: List is an ordered collection that allows elements to be repeated. Li
