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1. Add code to create database (similar to SQL statement) Add init schema.sql database syntax creation file to test resource file 2. Adding database in POM file depends on MySQL connector Java and mybatis spring boot starter <!--Add database dependency--> <dependency> <groupId>mysql</groupId> ...

Basic JDBC usage: package demo; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import org.junit.Test; /** * Test query class for all users * */ public class QueryAll { @Test public void testQueryAll(){ Connection conn= nul ...

The detailed steps of java connecting mysql database Connection Description: a. The driver of mysql connection b. mysql database installation c,eclipse e. Whether the database service is open (control panel - management tool - Service - find the corresponding service of mysql) f. Create a database 1. Create a new java project and t ...

After Spring and MyBatis are integrated, dao and mapper configuration files are generated by using the automatic code generation tool. The steps are as follows (take Intelli idea as an example). Write the generate code configuration file generatorConfig.xml. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration ...

1. Create required tables and insert data #Create Data Table mysql> create table fruits ( f_id char(10) not null, s_id int not null, f_name char(255) not null, f_price decimal(8,2) not null, primary key(f_id) ); #insert data mysql> insert into fruits(f_id,s_id,f_name,f_price) -> values('a1',101,'apple','5.2'), -> ('b1',101, ...

Download the tar of mysql binary installation file, and place the GZ package in / usr/local / Run script file #!/bin/bash function Cuser { groupadd -g 27 -o -r mysql useradd -M -N -g mysql -o -r -d /usr/local/mysql/data -s /bin/false -c "MySQL Server" -u 27 mysql } function file-tar { cd /usr/local/ ...

ProxySQL cluster Experimental environment informationMySQL master-slave information IP 1 role 188.188.0.68 Node1 188.188.0.69 Node2 188.188.0.70 Node3 ProxySQL service node IP 1 role 188.188.0.68 Node 68 188.188.0.71 Node 71 ProxySQL version: 2.0.3-29-g00f26d5 1, ProxySQL service installation Install the same version of P ...

MGR multi main mode configuration load balancing Experimental environment informationMySQL master-slave information IP role 188.188.0.68 Node1 188.188.0.69 Node2 188.188.0.70 Node3 ProxySQL version: 2.0.3-29-g00f26d5 >>>Server and user configuration<<< 1. Add backend database server Admin> SELECT * FROM mysql_s ...

After MySQL is upgraded to 8.0, how to solve the problem of PHP connection error? As a senior MySQL ticket pal, I've been blowing water for 8.0 recently. We know that several MySQL courses have been upgraded to version 8.0 since last year. My VPS has been trying to upgrade for a long time, but the PHP version is too low. I'm worried about ...

14_ProxySQL_Configuration Note: during the writing time of the article from April 201904 to may 201905, subsequent official updates in github were not written ~~How to configure proxysql in the simplest way This simple HOWTO describes how to configure some components of ProxySQL step by step. Note, however, that this is not a complet ...