MYSQL II - Data Management (Foreign Key, Add or Delete)

Mysql: MySQL Data Management Foreign Key Management Foreign key concept If the public key is the primary key in a relationship, then the public key is called the foreign key in another relationship. Thus, foreign keys represent the correlation between the two relationships. A table with another fo ...

Posted on Sat, 27 Jul 2019 00:33:38 -0700 by schajee

Vert.x Asynchronous Access to Database MySQL

Vert.x provides an API for asynchronous access to the database. Database operations are time-consuming and can easily block threads using the traditional synchronization model, resulting in overall performance degradation. Therefore, we need to use the asynchronous API provided by Vert.x for database operations. Vert.x provides a very low leve ...

Posted on Thu, 25 Jul 2019 12:44:04 -0700 by cfgcjm

LAMP Platform Deployment and Application

In the Internet, to provide a fully functional and extensible enterprise website server, not only HTTP server software, database system, but also dynamic web page program support are required.The LAMP platform integrates these services very well.As an enterprise operation and maintenance personnel, it is necessary to understand and master. Ove ...

Posted on Wed, 24 Jul 2019 10:10:00 -0700 by zipadee

springboot cooperates with maven to form executable jar and build image to deploy in docker container

This article describes how springboot applications can be packaged into jar packages and deployed into docker as docker images Application Packaging You need to package with spring-boot-maven-plugin to put the following code in the application pom file  <plugin>  <groupId>org.springframework.boot</groupId>  <artifactId> ...

Posted on Wed, 24 Jul 2019 00:20:21 -0700 by TheIrishThug

MySQL-source deployment

Source deployment 1. Some software needs to be uninstalled first mariadb-libs package needs to be uninstalled first in centos7 shell> rpm -e --nodeps mariadb-libs 2. Installing dependency packages yum -y install gcc gcc-c++ ncurses ncurses-devel cmake bison bison-devel The role of dependent pac ...

Posted on Tue, 23 Jul 2019 18:42:27 -0700 by lightkeepr

Installation and Understanding of MySQL

MySQL MySQL Download Be sure to download the installation package from the official website and use the installation package to download it. Official website MySQl Community Server(GPL) Keep Version Information in mind Version will not change Version consistent with enterprise uninstall Compute ...

Posted on Tue, 23 Jul 2019 18:37:34 -0700 by Shifty Geezer

Django Develops Personal Blog Project-Blog Database Design

Welcome to my blog: Tribal Cabinet of Alpaca Django operates the database through the Model. Whether your database type is MySql or Sqlite, Django automatically generates the corresponding database type of SQL statements for you, so you don't need to pay attention to the SQL statements and types, and Dj ...

Posted on Tue, 23 Jul 2019 18:15:56 -0700 by allspiritseve

7. Multi-table operation of Django's orm

Multi-table operation Three relationships: one-to-one, one-to-many, many-to-many 1. Data preparation and table model creation Configure settings to connect to the database # settings Change Configuration DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', 'NAME': 'orm03', 'HOST':'127.0.0.1', 'PORT':3306, 'USER':'root', 'PASSWORD' ...

Posted on Tue, 23 Jul 2019 06:48:15 -0700 by wata

Detailed explanation of ansible-playbook for ansible automatic operation and maintenance tools

http://www.yamllint.com/This blog article links up the first part: Installation of Ansible Automation Operation and Maintenance and Explanation of Common Modules Introduction to Playbook The playbook configuration file uses YAML grammar, which is concise and clear in structure. The playbook configuration file, similar to shell scripts, is a Y ...

Posted on Tue, 23 Jul 2019 03:32:22 -0700 by sathyan

Java Secondary Kill System Actual Series~Commodity Secondary Kill Code Actual

Summary: This blog is the sixth in the "Java Secondary Kill System Actual Series Articles". In this blog we will enter the code development of the core function module of the whole Secondary Kill System, that is, the code actual operation of the "Commodity Secondary Kill" function module. Content: The Commodity Secondary Ki ...

Posted on Mon, 22 Jul 2019 14:13:31 -0700 by fazzfarrell