search
HomeBackend DevelopmentPHP TutorialExplanation of knowledge related to SQL Date function

SQL Date Function is very important in the use of php, so this article will explain it.

SQL Date

When we deal with dates, the most difficult task is probably to ensure that the format of the inserted date matches the format of the date column in the database.

As long as the data contains only the date part, there will be no problem running the query. However, when time is involved, things get a little more complicated.

Before discussing the complexity of date queries, let's first take a look at the most important built-in date processing functions.

Explanation of knowledge related to SQL Date function

SQL Date Data Types

MySQL Use the following data types to store dates or dates in the database/ Time value:

DATE - Format YYYY-MM-DD

DATETIME - Format: YYYY-MM-DD HH:MM:SS

TIMESTAMP - Format: YYYY-MM-DD HH:MM:SS

YEAR - Format YYYY or YY

SQL Server uses the following data types to store date or date/time values ​​in the database:

DATE - Format YYYY-MM-DD

DATETIME - Format: YYYY-MM-DD HH:MM:SS

SMALLDATETIME - Format: YYYY-MM-DD HH: MM:SS

TIMESTAMP - Format: Unique Number

SQL Date Processing

If the time part is not involved, then we can easily compare two dates!

Explanation of knowledge related to SQL Date function

Now, we want to select the records whose OrderDate is "2008-12-26" from the above table.

We use the following SELECT statement:

SELECT * FROM Orders WHERE OrderDate='2008-12-26'

This article is related to the SQL Date function Explanation, for more learning materials, please pay attention to the php Chinese website to view.

Related recommendations:

Explanation on SQL VIEW (view) related knowledge

About SQL AUTO INCREMENT field related Explain

#Related operations of SQL ALTER TABLE statement

The above is the detailed content of Explanation of knowledge related to SQL Date function. For more information, please follow other related articles on the PHP Chinese website!

Statement
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
SQL Server使用CROSS APPLY与OUTER APPLY实现连接查询SQL Server使用CROSS APPLY与OUTER APPLY实现连接查询Aug 26, 2022 pm 02:07 PM

本篇文章给大家带来了关于SQL的相关知识,其中主要介绍了SQL Server使用CROSS APPLY与OUTER APPLY实现连接查询的方法,文中通过示例代码介绍的非常详细,下面一起来看一下,希望对大家有帮助。

SQL Server解析/操作Json格式字段数据的方法实例SQL Server解析/操作Json格式字段数据的方法实例Aug 29, 2022 pm 12:00 PM

本篇文章给大家带来了关于SQL server的相关知识,其中主要介绍了SQL SERVER没有自带的解析json函数,需要自建一个函数(表值函数),下面介绍关于SQL Server解析/操作Json格式字段数据的相关资料,希望对大家有帮助。

聊聊优化sql中order By语句的方法聊聊优化sql中order By语句的方法Sep 27, 2022 pm 01:45 PM

如何优化sql中的orderBy语句?下面本篇文章给大家介绍一下优化sql中orderBy语句的方法,具有很好的参考价值,希望对大家有所帮助。

Monaco Editor如何实现SQL和Java代码提示?Monaco Editor如何实现SQL和Java代码提示?May 07, 2023 pm 10:13 PM

monacoeditor创建//创建和设置值if(!this.monacoEditor){this.monacoEditor=monaco.editor.create(this._node,{value:value||code,language:language,...options});this.monacoEditor.onDidChangeModelContent(e=>{constvalue=this.monacoEditor.getValue();//使value和其值保持一致i

一文搞懂SQL中的开窗函数一文搞懂SQL中的开窗函数Sep 02, 2022 pm 04:55 PM

本篇文章给大家带来了关于SQL server的相关知识,开窗函数也叫分析函数有两类,一类是聚合开窗函数,一类是排序开窗函数,下面这篇文章主要给大家介绍了关于SQL中开窗函数的相关资料,文中通过实例代码介绍的非常详细,需要的朋友可以参考下。

如何使用exp进行SQL报错注入如何使用exp进行SQL报错注入May 12, 2023 am 10:16 AM

0x01前言概述小编又在MySQL中发现了一个Double型数据溢出。当我们拿到MySQL里的函数时,小编比较感兴趣的是其中的数学函数,它们也应该包含一些数据类型来保存数值。所以小编就跑去测试看哪些函数会出现溢出错误。然后小编发现,当传递一个大于709的值时,函数exp()就会引起一个溢出错误。mysql>selectexp(709);+-----------------------+|exp(709)|+-----------------------+|8.218407461554972

springboot配置mybatis的sql执行超时时间怎么解决springboot配置mybatis的sql执行超时时间怎么解决May 15, 2023 pm 06:10 PM

当某些sql因为不知名原因堵塞时,为了不影响后台服务运行,想要给sql增加执行时间限制,超时后就抛异常,保证后台线程不会因为sql堵塞而堵塞。一、yml全局配置单数据源可以,多数据源时会失效二、java配置类配置成功抛出超时异常。importcom.alibaba.druid.pool.DruidDataSource;importcom.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;importorg.apache.

Monaco Editor怎么实现SQL和Java代码提示Monaco Editor怎么实现SQL和Java代码提示May 11, 2023 pm 05:31 PM

monacoeditor创建//创建和设置值if(!this.monacoEditor){this.monacoEditor=monaco.editor.create(this._node,{value:value||code,language:language,...options});this.monacoEditor.onDidChangeModelContent(e=>{constvalue=this.monacoEditor.getValue();//使value和其值保持一致i

See all articles

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 Article

Hot Tools

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function