Home Database Mysql Tutorial An article explaining in detail the error reporting problem of MySQL setting only_full_group_by

An article explaining in detail the error reporting problem of MySQL setting only_full_group_by

Jan 24, 2023 am 07:30 AM
mysql only_full_group_by

An article explaining in detail the error reporting problem of MySQL setting only_full_group_by

The development environment is connected to mysql5.6, while the test environment is mysql5.7. During development, a friend wrote a sql statement about group by. It runs normally in the development environment, but exceptions are found in the test environment.

Cause analysis: MySQL5.7 version has the mysql sql_mode = only_full_group_by attribute set by default, causing an error.

ONLY_FULL_GROUP_BY is the culprit causing this error. In this strict mode, for the group by aggregation operation, if in select## If the columns in # do not appear in group by, then this SQL is illegal. Because in the sql written by the developer, the select column is not in the group by clause, and an error will be reported when using group by.

The test environment downloaded and installed the latest version of

mysql5.7.x. The only_full_group_by mode is enabled by default.

1. Check sql_mode

SELECT` `@@sql_mode;
Copy after login
and the value queried is:

##ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER, NO_ENGINE_SUBSTITUTION

2. Remove ONLY_FULL_GROUP_BY and reset the value.

SET` `@@``global``.sql_mode =``'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'``;
Copy after login

3. The above changes the global sql_mode, which is valid for the newly created database.

For existing databases, you need to execute it under the corresponding data

SET` `sql_mode =``'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'``;
Copy after login

The above method is still invalid after restarting the mysql database, and the following method is still effective after restarting

Find the configuration file of

MySQL

, in the /etc/my.cnf file on the linux system, query sql_mode field, I did not find this keyword in the configuration file, so I added it manually: <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">sql_mode = STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION</pre><div class="contentsignin">Copy after login</div></div>One thing to note is that it must be added in the

[mysqld]

configuration, like this After adding, restart mysql for it to take effect. Exit the database: exit, restart command: <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">service mysqld restart #lnmp重启mysql lnmp restart mysql</pre><div class="contentsignin">Copy after login</div></div> Refresh the page and the error message disappears. It is successfully resolved. Connect to the database again to view

sql_mode

Configurationselect @@sql_mode :

STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

This ends this article about
Mysql5 .7

and above versionONLY_FULL_GROUP_BY This article introduces the error solution, more related Mysql5.7 ONLY_FULL_GROUP_BY## is as follows For the meaning of common values ​​​​of sql_mode, refer to:

ONLY_FULL_GROUP_BY: For GROUP BY aggregation operation, if the column in SELECT does not appear in GROUP BY, then this SQL is illegal because the column Not in the GROUP BY clause

NO_AUTO_VALUE_ON_ZERO: This value affects the insertion of auto-growing columns. Under the default settings, inserting 0 or NULL represents generating the next auto-increasing value. This option is useful if the user wants to insert a value of 0 and the column is auto-increasing.

STRICT_TRANS_TABLES: In this mode, if a value cannot be inserted into a transaction table, the current operation will be interrupted, and there will be no restriction on non-transaction tables.

NO_ZERO_IN_DATE: In strict mode, Zero dates and months are not allowed

NO_ZERO_DATE: Set this value, the mysql database does not allow the insertion of zero dates, and inserting zero dates will throw an error instead of a warning.

ERROR_FOR_DIVISION_BY_ZERO: During the INSERT or UPDATE process, if the data is divided by zero, an error is generated instead of a warning. If the mode is not given, MySQL returns NULL when the data is divided by zero

NO_AUTO_CREATE_USER: Disables GRANT from creating users with empty passwords

NO_ENGINE_SUBSTITUTION: If the required storage engine is disabled or not compiled , then an error is thrown. When this value is not set, the default storage engine is used instead and an exception is thrown.

PIPES_AS_CONCAT: Treat "||" as a string connection operator instead of an OR operator, which is the same as the Oracle database Similarly, it is similar to the string concatenation function Concat

ANSI_QUOTES: After enabling ANSI_QUOTES, double quotes cannot be used to quote the string because it is interpreted as an identifier.

Recommended learning: "

MySQL Video Tutorial

"

The above is the detailed content of An article explaining in detail the error reporting problem of MySQL setting only_full_group_by. 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

Video Face Swap

Video Face Swap

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

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's Role: Databases in Web Applications 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 start mysql by docker 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

Laravel Introduction Example Laravel Introduction Example Apr 18, 2025 pm 12:45 PM

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.

Solve database connection problem: a practical case of using minii/db library Solve database connection problem: a practical case of using minii/db library Apr 18, 2025 am 07:09 AM

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.

How to install mysql in centos7 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

Laravel framework installation method Laravel framework installation method Apr 18, 2025 pm 12:54 PM

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: Core Features and Functions MySQL and phpMyAdmin: Core Features and Functions Apr 22, 2025 am 12:12 AM

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.

Centos install mysql Centos install mysql Apr 14, 2025 pm 08:09 PM

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.

See all articles