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0. Simple Course Management 0.1 Establishment of database tables MySQL create table t_teachers ( id int(5) primary key , username varchar(30) unique not null , password varchar(32) not null , name varchar(100) , gender varchar(6), birthdate date ); Note that id is the primary key in ...

background Archived tables exist in both source and target Libraries The scenarios of pt-archiver archive table are as follows: no deletion of original table data, non-batch insertion of target database; no deletion of original table data, batch insertion of target database; non-batch deletion of original table data, non-batch insertion of tar ...

I. MySQL Gets the Current Date-Time Function 1.1 Get the current date + time Function: now() mysql> select now(); +---—+ | now() | +---—+ | 2008-08-08 22:20:46 | +---—+ In addition to the now() function to get the current date and time, MySQL has the following functions: current_timestamp() ...

I. Preface Recently, the company's project is ready to start refactoring. The framework is chosen as SpringBoot+Mybatis. This article mainly records the process of building SpringBoot multi-module project in IDEA. 1. Development Tools and System Environment IDE: IntelliJ IDEA 2018.2 System ...

Preface To be honest, this chapter was not meant to talk about, because there are many similar tutorials on the Internet that configure multiple data sources. But recently, because the project uses sub-database and sub-table, let me study how to achieve it. I think about the last blog about multi-environment configuration, different environment ...

In OSSIM sensor, the conversion of communication protocol and data format between OSSIM proxy and OSSIM server is realized through GET framework. Let's take a brief look at the ossim-agent script:#!/usr/bin/python -OOtimport syssys.path.append('/usr/share/ossim-agent/')sys.path.append('/usr/local/share/ossim-agent/')from ossim_agent.Agent impo ...

preparation in advance Complete hadoop installationComplete the installation of mysql Download Hive wget http://mirror.bit.edu.cn/apache/hive/hive-2.3.0/apache-hive-2.3.0-bin.tar.gz Or go to the official website and install it. Unzip to the spe ...

about Sometimes, with the development of business, the data sources associated with the project will become more and more complex, and the database used will be more dispersed. At this time, multi-data sources will be used to obtain data. In add ...

WEB Backend Service Day 21 - Project Day 1 1. Build a project team development platform II. Basic usage of Docker and Quick Deployment Projects 2.1 Basic Description Mainstream Development Model: DevOps Development as Operations Maintenance Doc ...

This article source code: GitHub. Click here || GitEE. Click here I. Observer Model 1. Concept Description The observer pattern is the object's behavior pattern, also known as the Publish/Subscribe pattern. The observer pattern defines a one-to-many dependency that allows multiple observer objects to simultaneously listen to a subject object, ...