Programmer Group

What is a stored procedure? That is, you can write logical sql, such as judgment, loop, etc,, What are the benefits? Imagine that we want to insert 100 pieces of data. Compared with batch operation, it is sure that the efficiency of the stored procedure is high In addition, the running speed of stored procedures is v ...

Preface Recently, during an interview, I was asked the difference between a Class.forName() loading class and a ClassLoader loading class in the Java reflection.I didn't come up with it at that time. I studied it myself and wrote it down. explain Class.forName() and lassLoader can both load classes in java.ClassLoader is a class loader that fol ...

Preface In May 17, 2013, after the last IBM small computer of Alibaba group was released from Alipay, there is no doubt that MySQL is already the most widely used database in Internet Co nowadays. Mysql is free and open source, and it can be conveniently extended horizontally to support high concurrency traffic. Small and medium-sized enterpri ...

Catalog 1. Blog writing background 2. LocalDateTime front-end interaction 2.1 LocalDateTime writes a timestamp to the front end 2.1.1 fastJson default write format 2.1.2 Change the fastJson write format so that it writes back the timestamp () 2.2 Receive the time stamp passed by the front end as LocalDateTimme 2.2.1 LocalDateTime Default ...

1.https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz Download the installation package. The previous MySQL installation failed because of the selected version. It is recommended to select [Linux generic] Decompression: tar zxvf mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz //Put the ...

This article is the end of the trilogy of Flink's DataSource. The previous studies are all about Flink's existing data source functions. However, if these cannot meet the needs, you need to customize the data source (such as obtaining data from the database), which is the content of today's actual combat, as shown in the red box below:###Flink' ...

Talk nineteen to the dozen During the crazy overtime work less than a month after returning to work, I haven't had much time to write blog recently, which is a little bit slow. Fortunately, in the projects I do, not all are business logic of addition, deletion and modification, or some more interesting and practical technical points, so I sorte ...

Source code: GitHub point here || GitEE point here 1, Introduction to PostgreSQL 1. Database introduction PostgreSQL is a powerful open source database system, which has the characteristics of reliability, stability, data consistency, and can run on all major operating systems, including Linux, Unix, Windows, etc. PostgreSQL is a complete tran ...

I am Xiaoxian, a non slash youth who focuses on big data and distributed technology. I love Coding, reading, photography and life more! Source code warehouse: https://github.com/zhshuixian/learn-spring-boot-2 The previous section mainly introduces Spring Boot integrating Log4j2 and Slf4j to print and output logs to files. In the application d ...

This article is mainly intended to show the use of jdbc to make it easier to read MyBatis source code and to warm up for source analysis. Many of the key information can be found in the MyBatis source code. This article does not analyze the MyBatis source code. Because the MyBatis source code is a huge and complex project, it can't be said in j ...