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4, Some data processing methods create table Total_Sales (Name char(10),Sales int(5)); insert into Total_Sales values ('zhangsan',10); insert into Total_Sales values ('lisi',15); insert into Total_Sales values ('wangwu',20); insert into Total_Sales values ('zhaoliu',40); insert into Total_Sales values ('sunqi',50); insert into Total_Sales ...

6. Services Transaction is to execute a group of SQL statements in the same batch. ACID principle: Atomicity All operations in the whole transaction are either completed or not completed. It is impossible to stagnate in an intermediate link. If an error occurs during the execution of a transaction, it will be rolled back to the state before ...

Implement Paging 1> Business logic for paging implementation 1->N data are displayed on each page. For the total number of data records M, the number of pages M%N==0?M/N:M/N+1; 2->Page Rendering Paging html Part 3>Switch pages, input parameters, background processing, and retrieve new eligible data 4>Paging method, js paging, and ...

Docker is a lightweight virtualization technology, and lnmp is a powerful, open-source web running environment, so here's a demonstration of using Docker to build an lnmp image. PS: To maintain lightweight and scalable performance, Docker encourages us to "one process per person"Container"means don't integrate too many functions ...

Druid is the best database connection pool in the Java language and provides powerful monitoring and extension capabilities. After comparing Druid with HikariCP, although HikariCP has a higher performance than Druid, Druid includes many dimensions of statistical and analytical functions, which is why everyone chooses t ...

Recently, I watched a lot of spring boot teaching videos. I felt they were too long, and there was no actual combat of the project. Today, according to a blogger to write a simple user system to add, delete, modify and check, the source code can refer to the second issue of the article. This project use ...

Modify MySqlMariaDB password Change Password Modify the original password as soon as you know it 1 Use the SET PASSWORD command to change the password 2 UPDATE Command Modify Password 3 mysqladim change password 2 Forget the original password to modify Modify MySql/MariaDB password   Change Passwor ...

seata is an open source distributed transaction solution dedicated to providing high-performance and easy-to-use distributed transaction services. seata will provide users with AT, TCC, SAGA and XA transaction modes, and build a one-stop distributed solution for users. The purpose of this tutorial is to provide a quick start to the case of seat ...

Update 2020.06.23 1 Background Develop an app to interact with the background database, based on MySQL+native JDBC+Tomcat, without using DBUtils or JDBC framework, pure underlying JDBC implementation.In the future, we will gradually change to the Spring framework, optimize MySQL, further deploy Tomcat and so on. Now the project is just startin ...

SSRF uses Gopher 0X01 foreword After studying the application of Gopher protocol for one day, I decided to write a summary about the SSRF utilization of Gopher protocol. Reference link: https://blog.csdn.net/qq_41107295/article/details/103026470 0X02 overview SSRF (server side request forgery) se ...