How to write one to many page SQL?

1. Preface One to many paging of MySQL data is a very common requirement. For example, we need to query the product and the image information of the product. But many people will encounter the mistake of pagination here and get incorrect results. Let's analyze and solve this problem today. 2. Problem analysis First, we create a simple product ...

Posted by cs-web on Mon, 22 Jun 2020 20:39:35 -0700

The analysis of the screen in the hidden corner, the production of the word cloud, to see how the audience's evaluation of the play

preface The text and pictures of this article are from the Internet, only for learning and communication, not for any commercial purpose. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Recently, there is a very popular suspense and reasoning play: the secret corner. Douban scored ...

Posted by gottes_tod on Sun, 21 Jun 2020 23:53:42 -0700

Python Web Crawler Warfare: Jiayuan discovered amazing secrets after crawling nearly 60,000 Miss and Sister data

It's 11/11 again. I don't know when it started. 11/11 changed from "Singles Day" to "11/11 Shopping Carnival". The last single dog festival was also successfully conquered and became a holiday for couples to give gifts and love. Turning over the quiet to silent chat list, I suddenly woke up. No, we can't go on like this. Wh ...

Posted by dan7474 on Sun, 21 Jun 2020 15:01:24 -0700

Connection pool & mybatis Foundation

"Connection pool & mybatis introduction notes" Learning objectives Be able to understand the principle of connection pool to solve current problems Able to use C3P0 connection pool Ability to use DRUID connection pool Master the quick start of mybatis framework development Principl ...

Posted by spires on Sun, 21 Jun 2020 00:12:55 -0700

Mainstream Framework Learning - mybatis (java review day21)

I. mybatis Foundation 1. Analysis of Starter Case Design Mode public static void main(String[] args) throws Exception{ //Read Configuration File InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml"); //Create SqlSessionFactory Factory /* Creating factory mybatis uses build ...

Posted by son.of.the.morning on Sat, 20 Jun 2020 19:15:42 -0700

Understand the Spring Web zero xml configuration principle and parent-child container relationship this time

preface When using the old versions of Spring and Spring MVC for development, we need to configure a lot of XML files, which is very cumbersome. It is also very bad to let users choose their own configuration. Based on the stipulation that the Convention is greater than the configuration, Spring provi ...

Posted by croix on Fri, 19 Jun 2020 23:54:06 -0700

xml-based AOP in Spring

1. The whole process of Aop is Aspect Oriented Programming, which is a technology for facet-oriented programming, to achieve the same maintenance of program functions through pre-compilation and run-time dynamic agents.Aop is the continuation of oop, a hot spot in software development, and an important content in Spring framework.It is a derive ...

Posted by Bikkebakke on Fri, 19 Jun 2020 17:58:24 -0700

Face recognition based on opencv+python+pycharm

Face recognition based on opencv+python+pycharm catalog preface preparation in advance Face detection Sample collection Sample training epilogue preface I am a sophomore in the University, programming rookie. Recently, I did the final course design, and the topic I chose was face recognition. W ...

Posted by meritre on Fri, 19 Jun 2020 04:31:25 -0700

Work summary of static module of thmeleaf page of B2C e-commerce project

1, Thymeleaf 1.1 introduction to Thymeleaf Thymeleaf is an XML/XHTML/HTML5 template engine, which can be used for application development in Web and non Web environments. It is an open source Java library, based on the Apache License 2.0 license, created by Daniel Fern á ndez. The author is a ...

Posted by jane on Fri, 19 Jun 2020 04:29:57 -0700

a21_Python development web crawler - learning notes

Select reference Because I am learning to write at the same time, rather than starting to write in a very organized way after I have learned it completely, so reference materials are very important (originally personal development experience is very important, but I am zero Foundation) Official Py ...

Posted by zero816 on Fri, 19 Jun 2020 03:15:13 -0700