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Pure Linux PostgreSQL offline installation tutorial for girlfriend PostgreSQL database installation, based on version 10.5.1, Use *. gz binary compression package to install manually on Linux system. Installation package: postgresql-10.5.1-linux-x64-binaries.tar.gz 1. Create postgres user groupadd p ...

I'm the interviewer of Microsoft YaHei: it's 85 years old Me: Well, 35 Interviewer: that should be very experienced. Let's talk about spring Me: OK, I've used this for more than 10 years. You can ask me whatever you like Interviewer: have you ever used events in Spring? Me: Yes Interviewer: can you exp ...

In the previous several articles, we introduced abp vNext microservice framework, development environment construction and access to the front-end framework of vue element admin respectively. After the basic functions of user role management are implemented in vue element admin, we can start business development. This article will introduce how ...

Node.js The use of Express framework Node.js The use of Express framework 1 Introduction to express framework 1.1 introduction and features of express framework 1.2 preliminary use of Express 2 Express framework Middleware 2.1 middleware introduction two point two app.use Usage of Middleware 2.3 ...

1. Preface The resultMap element is the most important and powerful element in MyBatis. It frees you from 90% of JDBC ResultSets data extraction code, and in some cases allows you to perform operations that JDBC does not support. In fact, when writing mapping code for complex statements such as conn ...

1. E-commerce mode B2B: Business to Business (Alibaba) C2C: customer to consumer B2C: Business to Customer C2B: Customer to Business individual to enterprise (commodity house matching) (individual demand, enterprise production) O2O: Online to Offline (meituan, hungry) F2C: Factory to Customer ...

Table Join Query 1. What is a multi-table query Preparing data # Create Department Table create table dept( id int primary key auto_increment, name varchar(20) ) insert into dept (name) values ('Development Department'),('Marketing Department'),('Finance Department'); # Create employee table create table emp ( id int primary key auto_in ...

Author: Hong bin The person in charge and technical service director of akerson South District, MySQL ace, is good at database architecture planning, fault diagnosis, performance optimization analysis, with rich practical experience, helping customers in various industries to solve MySQL technical problems, and providing overall MySQL solutio ...

In development, an exposed interface may face a large number of repeated requests in an instant. If you want to filter out repeated requests and cause damage to the business, you need to implement idempotent Idempotent: Any number of executions has the same impact as a single execution. The final meani ...

This is a series of articles. If you haven't read the first episode, please jab here: Alibaba Nacos registration center of Spring Cloud series (I) This article introduces the construction of Nacos registry cluster environment. 　　 Construction of Nacos cluster environment 　　 The cluster mode is the same as our usual capacity expansion. It ca ...