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The second part tests insert and update: 1 Environmental preparation Two scenarios, Insert and Update, are prepared respectively. For the Update scenario, two scenarios are also prepared: Update through index and Update without index. 1.1 Update The code is as follows: package com.dhb.gts.javacourse.week6.mysqltest; import com.dhb.gts.jav ...

MySQL query sorting 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 ； 1.1 use of select Use format select Listing as 'alias', Listing ,.....from Table name where query criteria; Relevant rules An asterisk () means all columns. ...

Database notes Database foundation 1. Start MySql service on the terminal: net start mysql; 2. Connect to MySQL: (add one, not - proot; oh) mysql -h localhost -p 3306 -u root -proot (h Database links, p Database port number, u Database user name -p Database password, p (no space between and password) 3. View database: `show databases; ...

  Introduction to mysql (1) Introduction to MySQL Mysql is a relational database. It is characterized by saving these data in different two-dimensional tables and putting these tables into the database, which can increase its reading speed. (2) Application architecture of mysql Single, suitable for small-scale applications Replicat ...

Code version: mysql 8.0.22 Programming language: C + + & & C + + 11 & & C + + 14 & & C + + 17 Previous article: Analysis on the specific execution process of an insert statement in mysql 8.0 (2)_ A ray of sunshine blog - CSDN blog This chapter mainly introduces the storage engine. This chapter mainly introduces which ...

Introduction Canal is a high-performance data synchronization system based on MySQL binary log. It is an open source project of Alibaba. It is implemented based on java. It has been widely used in many large Internet project production environments, including Alibaba and meituan. It is an unusually mature database synchronization scheme. T ...

Build environment Build database table MySQL database is used. Create a new database named task and a new table named student in the task database. Add data to the table as appropriate. The SQL statements for creating tables and adding data are as follows. SET FOREIGN_KEY_CHECKS=0; --Create table DROP TABLE IF EXISTS `student`; CREATE TABLE ...

1, Common field type classification   Common field types typeclassificationdescribeNumerical typeintegerdecimal ① Fixed point number ② Floating point number characterShorter text ①char ②varchar Long text ①text ② Blob (binary data) Date time type 1.1 numerical type   1.1.1 integer characteristic: The integer type is signed ...

Windows install MySql 1. Download Browser input https://downloads.mysql.com/archives/community/ Select the required version and install the required operating system. Here I download MySQL 8.0 and the compressed package of Windows system. Click Download to Download. If the Download speed is very slow, you can open the Download and copy the ...

1, Build mysql container service 1. Pull image docker pull mysql:8.0.20 2. Create any container (just to copy the mount directory) docker run -p 3306:3306 --name mysql -e MYSQL_ROOT_PASSWORD=123456 -d mysql:8.0.20 Check whether the startup is successful: docker ps -a 3. After successful startup, enter the container and copy the ...