php怎么查询某月或者某日有数据且输出(文章归档功能)
有 articles表
id class title content pubtime
1 10 标题1 内容1 1342756599
2 11 标题2 内容2 1339392385
3 12 标题3 内容3 1339390661
4 10 标题4 内容4 1339139926
5 13 标题5 内容5 1339139892
6 16 标题6 内容6 1342756624
希望查询的结果是:
1.如2012年8月、2012年6月内有文章,输出一次 2012年8月、2012年6月的链接,最好能计算出汇总,有多少篇文章。
2.如2012年7月16日、2012年7月28日有文章 则倒序输出 2012年7月28日、2012年7月16日的链接,最好能计算出汇总,有多少篇文章。
不会写,给个思路也行啊。
------解决方案--------------------
- SQL code
SELECT count(1) FROM `articles` WHERE `pubtime` > 6月1号0点时间戳 and `postdate` <font color="#e78608">------解决方案--------------------</font><br>
------解决方案--------------------
- SQL code
>select count(1), date(pubtime) from articles group by date(pubtime);<br><font color="#e78608">------解决方案--------------------</font><br>先把几个点的时间戳取出来.如2012年8月、2012年6月。<br>然后在拼接sql查询,应该很容易的。 <br>别着急,你试试<br><font color="#e78608">------解决方案--------------------</font><br>1、<br>select FROM_UNIXTIME(pubtime, '%Y-%m') as pubtime, count(*) as cnt from articles group by FROM_UNIXTIME(pubtime, '%Y-%m')<br><br><font color="#e78608">------解决方案--------------------</font><br>这是每个月:<br>
- SQL code
>select count(1), extract(year_month from pubtime) from articles group by extract(year_month from pubtime);<br><font color="#e78608">------解决方案--------------------</font><br>有个问题,在sql中使用函数会影响sql的执行效率,被用字段的主键什么的,有时候也没效果
------解决方案--------------------
------解决方案--------------------
- SQL code
SELECTSUM(CASE when MONTH( FROM_UNIXTIME(pubtime, '%Y-%m-%d'))=6 THEN 1 ELSE 0 END)AS sum_6,SUM(CASE when MONTH( FROM_UNIXTIME(pubtime, '%Y-%m-%d'))=8 THEN 1 ELSE 0 END)AS sum_8FROM dc_admin<div class="clear"> </div>

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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

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

Hot Article

Hot Tools

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.

Dreamweaver Mac version
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version
Useful JavaScript development tools