jsp + servlet hospital appointment registration system based on javaweb + mysql (java + jdbc + jsp + mysql + ajax) Private message Source code acquisition and debugging communication Operating environment Java≥8, MySQL≥5.7, Tomcat≥8 development tools eclipse/idea/myeclipse/sts, etc. can be configured to run Be applicable Course design, major assignments, graduation projects, project exercises, learning demonstrations, […]
Tag: sql
MySQL Backup and Recovery: Protecting Data Security and Business Continuity
1. Quote MySQL is a widely used relational database management system. For any enterprise or individual, data security and continuity are crucial. Backup and recovery are one of the important means to protect data security and achieve business continuity. This article will introduce the importance of MySQL backup and recovery, the selection of backup strategies, […]
Do you really know how to use EXPLAIN in MySQL?
EXPLAIN is a powerful tool in MySQL database for query performance analysis and optimization. Through EXPLAIN, you can view the execution plan of the MySQL query and understand how MySQL executes your query statement. This article will introduce the use of EXPLAIN in detail to help you better understand and optimize MySQL queries. Why use […]
jsp+servlet simple message board based on javaweb+mysql (java+jsp+servlet+javabean+mysql+tomcat)
jsp + servlet simple message board based on javaweb + mysql (java + jsp + servlet + javabean + mysql + tomcat) Private message Source code acquisition and debugging communication Operating environment Java≥8, MySQL≥5.7, Tomcat≥8 development tools eclipse/idea/myeclipse/sts, etc. can be configured to run Be applicable Course design, major assignments, graduation projects, project exercises, learning […]
[PG] PostgreSQL high availability solution repmgr deployment (very detailed)
Table of Contents Introduction 1 Overview 1.1 Terminology 1.2 Components 1.2.1 repmgr 1.2.2 repmgrd 1.3 Repmgr users and metadata 2 Installation and deployment 2.0 Deployment environment 2.1 Installation requirements 2.1.1 Operating system 2.1.2 PostgreSQL version 2.1.3 Operating system users 2.1.4 Installation location 2.1.5 Version requirements 2.2 Installation 2.2.1 Software package installation 2.2.2 Source code compilation […]
MySQL constraints & special queries
MySQL Constraints & Special Queries Article directory MySQL Constraints & Special Queries 1. Database constraints 1.1 Constraint types 1.2 NULL constraints 1.3 NUIQUE: unique constraint 1.4 DEFAULT: Default value constraints 1.5 PRIMARY KEY: Primary key constraints 1.6 FOREIGN KEY: foreign key constraints 1.7 CHECK constraints 2. Relationship between tables 2.1 One-on-one 2.2 One-to-many 2.3 Many-to-many […]
3Spring Boot 3 integrates mybatis-plus+druid+mysql
Directory 【3】Spring Boot 3 integrated components: Druid + Mybatis Plus + Mysql integration solution 1. Hikari + jdbc + mysql integration solution increase dependency Add configuration Spring Testng test cases 2. Druid + Mybatis Plus + Mysql integration solution 2.1 Configure Druid Add dependencies Configuration Start Spring Boot Web Starter Spring Testng test cases 2.2 […]
[PG] Configuration file for PostgreSQL high availability solution repmgr management
1 Configuration File 1.1 Configuration file format repmgr.conf is a plain text file containing one parameter/value combination per line. White spaces are irrelevant (except within quoted parameter values), and blank lines are ignored. #Specifies the remainder of the line as a comment. Parameter values that are not simple identifiers or numbers should be enclosed in […]
MySQL–MHA high availability
MHA related knowledge 1.What is MHA MHA (MasterHigh Availability) is an excellent set of failover and master-slave replication software in MySQL high availability environment The emergence of MHA is to solve the problem of MySQL single point of failure. Purpose: During the MySQL failover process, MHA can automatically complete the failover operation within 0-30 seconds. […]
MATLAB connects to the MYSQL database and performs addition and deletion operations
I recently built an experiment management system. The new UI interface of matlab is relatively interactive and user-friendly. I am new to mysql and have never touched a database before, so I will make a record. 1. Environment installation 1. Make sure that matlab has database toolbox installed, which can be queried through the ver […]