Table of Contents
from_unxitime Syntax description:
format format description:
Example: Count by hour
Home Database Mysql Tutorial Instructions for using the mysql timestamp formatting function from_unixtime

Instructions for using the mysql timestamp formatting function from_unixtime

Jun 09, 2018 am 09:32 AM
mysql function

We generally use the field type int(11) timestamp to save the time, which facilitates query efficiency. But this has a disadvantage. The displayed timestamp makes it difficult to know the real date and time.

mysql provides a timestamp formatting function from_unixtime to convert the format

from_unxitime Syntax description:

1

from_unixtime(unix_timestamp, format)

Copy after login

Returns a string of Unix time stamps , formatted according to format. If format is empty, the format %Y-%m-%d %H:%i:%s will be used by default

For example:

1

2

3

4

5

6

7

mysql> select from_unixtime(1459338786);

+---------------------------+| from_unixtime(1459338786) |

+---------------------------+| 2016-03-30 19:53:06       |

+---------------------------+1 row in set (0.00 sec)mysql> select from_unixtime(1459338786, '%Y-%m-%d %H:%i:%s');

+------------------------------------------------+| from_unixtime(1459338786, '%Y-%m-%d %H:%i:%s') |

+------------------------------------------------+| 2016-03-30 19:53:06                            |

+------------------------------------------------+1 row in set (0.00 sec)

Copy after login

format format description:

%M month name (January~December)
%W week name (Sunday~Saturday)
%D date of the month with English prefix (1st, 2nd, 3rd, etc.)
%Y year, number, 4 digits
%y year, number, 2 digits
%a abbreviated name of the week (Sun~Sat)
%d in the month Number of days, number (00~31)
%e Number of days in the month, number (0~31)
%m Month, number (01~12)
%c Month, number (1~12)
%b Abbreviated month name (Jan~Dec)
%j Number of days in a year (001~366)
%H Hours (00~23)
%k Hours (0~23 )
%h hours (01~12)
%I hours (01~12)
%l hours (1~12)
%i minutes, numbers (00~59)
%r time, 12 hours (hh:mm:ss [AP]M)
%T time, 24 hours (hh:mm:ss)
%S seconds (00~59)
%s seconds (00~59)
%p AM or PM
%w The number of days in a week (0=Sunday~6=Saturday)
%U The week (0~52), where Sunday is the first day of the week Day
%u Week (0~52), here Monday is the first day of the week
%% A text%

Example: Count by hour

1

2

3

4

mysql> select from_unixtime(addtime,'%Y-%m-%d %H') as date,count(*) from `table` group by from_unixtime(addtime,'%Y-%m-%d %H');

+---------------+----------+| date          | count(*) |

+---------------+----------+| 2016-03-30 19 |      409 || 2016-03-30 20 |      161 |

+---------------+----------+2 rows in set (0.00 sec)

Copy after login

This article explains the usage instructions of the MySQL timestamp formatting function from_unixtime. For more related content, please pay attention to the PHP Chinese website.

Related recommendations:

About the usage instructions of mysql functions concat and group_concat

##About mysql innodb failed to start and cannot be restarted Explanation of processing methods

#Explanation of php to obtain relevant content of the specified date

The above is the detailed content of Instructions for using the mysql timestamp formatting function from_unixtime. 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)

Hot Topics

Java Tutorial
1663
14
PHP Tutorial
1266
29
C# Tutorial
1237
24
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.

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.

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.

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.

MySQL vs. Other Programming Languages: A Comparison MySQL vs. Other Programming Languages: A Comparison Apr 19, 2025 am 12:22 AM

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages ​​such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages ​​have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

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 for Beginners: Getting Started with Database Management MySQL for Beginners: Getting Started with Database Management Apr 18, 2025 am 12:10 AM

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

Solve MySQL mode problem: The experience of using the TheliaMySQLModesChecker module Solve MySQL mode problem: The experience of using the TheliaMySQLModesChecker module Apr 18, 2025 am 08:42 AM

When developing an e-commerce website using Thelia, I encountered a tricky problem: MySQL mode is not set properly, causing some features to not function properly. After some exploration, I found a module called TheliaMySQLModesChecker, which is able to automatically fix the MySQL pattern required by Thelia, completely solving my troubles.

See all articles