Programmer Group

This note is the learning content of Alibaba cloud Tianchi Longzhu plan SQL training camp. The link is: https://tianchi.aliyun.com/specials/promotion/aicampsql； 1, First knowledge of SQL SQL statements can be divided into the following three categories: 1. DDL DDL (Data Definition Language) is used to create or delete databases for storing ...

Introduction: MSE microservice engine will launch the professional version of service governance, providing out of the box and complete professional microservice governance solutions to help enterprises better realize microservice governance capabilities. If your system can quickly have a complete full link gray-scale capability as described in ...

Write in front: strongly accuse those who copy and paste other people's blogs but don't know whether it is feasible to practice; I have read countless blogs, experimented with many methods, and summarized the pitfalls: almost all articles are source code compilation, and the compilation methods are similar, but no one has ever written how m ...

1, The simplest timingIn our program, it is necessary to time an operation or method so that we can observe whether the operation or method meets our expectations. Therefore, when we first come into contact with Java, we can write code like the following to time:public static void main(String[] args) { Long startTime = System.currentTimeMil ...

Taro DesignA simple, easy-to-use, easy to expand and integrate mobile page editorcharacteristicPublishing to npm market can easily integrate it into your project.You can easily write a component to run in this editor, or simply modify your existing component to run in the editor.The edited data supports applet, H5 and React Native at the same t ...

prefaceIn the previous article, we introduced the basic knowledge of View and the implementation of View sliding. This article will bring you a core knowledge point of View, event distribution mechanism. Event distribution mechanism is not only a core knowledge point, but also a difficulty in Android. Let's analyze the transmission of events fr ...

1, Foreword You can install it according to the instructions on the Zen official website: Zen - installation instructions using the source package (common to all systems) 2, Download Go directly to the Zen official website to find the installation package to download. I use the installation package here instead of the Linux one click ...

Typora is a software I often use to write MarkDown. It is very comfortable and has a very excellent use experience:Real-time Preview Custom image upload serviceDocument conversionTheme customizationcauseHowever, I encountered a very interesting thing. When I copy and paste the Typora content into the text editor, I will get the content in MarkD ...

Review review Python provides a large number of excellent function packages for data display. Among them, matplotlib module can easily draw and make high-quality data packages such as line chart, histogram and scatter chart. About the matplotlib module, we have studied the basic framework and common methods of matplotlib in the early stage P ...

prefaceHow to install MySQL database step by step on a Linux host? You must be right to read this article!1, Linux server installationOptions for installing Linux server: Centos, Redhat, Oracle Linux.Linux installation package download:https://mp.weixin.qq.com/s/PFKkftgaTWpJKCnhI3uxZwReferring to the documents on the official website, the actua ...