J2EE project instance super detail

J2WEB course design example I found a good article about database query display error: Analysis of mysql coding errors. And then I have a crack free version navicat . extraction code: dv6k catalog Project Name: xixijiaxiang online e-book City Project background: (if I think about it myself, I won ...

Posted by brucensal on Mon, 15 Jun 2020 07:23:16 +0200

Enterprise Actual LNMP High Performance Server_phpMyAdmin deployment

Enterprise Actual LNMP High Performance Server_phpMyAdmin deployment In LNMP WEB architecture, Nginx is a high performance WEB server and cannot process PHP itself. When receiving HTTP Request requests from client browsers, Nginx server responds to and processes WEB requests. Static resource CSS, pictures, videos, TXT and other static file req ...

Posted by jumphopper on Sun, 14 Jun 2020 18:20:40 +0200

spring boot series mybatis paging query

Article catalog preface Introducing pagehelper dependency application.yml Medium configuration Add interface Test paging query interface Problem summary application.yml Configuration of pagehelper in preface If you use mybatis to write paging query, it's troublesome. You need to write the select ...

Posted by dicamille on Sun, 14 Jun 2020 09:01:08 +0200

Summary of Spring IOC knowledge points

@Configuration configure spring and start the spring container @Configuration is used to define the configuration class, which is labeled on the class, which is equivalent to < beans > in the xml configuration file of spring. Its function is to configure the spring container (application context) Example description: Configuration class @ ...

Posted by lyealain on Sun, 14 Jun 2020 07:17:49 +0200

Chapter 5 of "Introduction to Flask": learning Flask Sqlalchemy is enough. Don't write too many

Chapter 5 of "Introduction to Flask": learning Flask Sqlalchemy is enough. Don't write too many According to my personal understanding, database is a tool to store data and the direct relationship between data and data. No matter the complexity or size of the data it stores, it has no ess ...

Posted by parse-error on Sun, 14 Jun 2020 05:53:41 +0200

Mysql enable slow query and log analysis

1, Why open slow query Most of the reasons for the poor query performance are the large amount of data. To start the slow query of mysql and record the SQL statements that take a long time to query in the log is conducive to our better position and optimization. 2, Several common reasons for the ...

Posted by bg on Sun, 14 Jun 2020 05:47:10 +0200

The spring boot series integrates MyBatis framework

Add Dependency <!--Add to mysql and mybatis rely on--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <a ...

Posted by Jragon on Sat, 13 Jun 2020 20:59:15 +0200

Centos7 implementation of MySQL database backup and recovery

brief introduction MySQL database backup can be divided into logical backup and physical backup. The logical backup tools are mysqldump and the physical backup tools are xtrabackup. The two backup methods have their own advantages and disadvantages Backup tools mysqldump xtrabackup advantage Support hot backup and incremental backup, requ ...

Posted by Gath on Fri, 12 Jun 2020 11:30:10 +0200

[Huawei Cloud Technology Sharing] Database Development: MySQL Seconds_Behind_Brief Master Analysis

[Summary] For mysql primary and standby instances, seconds_behind_master is an important parameter to measure the delay between master and slave.Seconds_can be obtained by executing "show slave status;" on slaveBehind_The value of master. Seconds_Behind_Master For mysql primary and standby instances, seconds_behind_master is an impor ...

Posted by heldenbrau on Fri, 12 Jun 2020 06:20:43 +0200

JSON type of new MySQL 5.7 features

With the wide application of NOSQL database, the extensible storage mode also has a good support in relational database. A new data type, JSON, has been added in MySQL 5.7   JSON data type meaning In fact, without the support of JSON data type, we can save the data in this format by varchar type or text type, but why do we need to specifica ...

Posted by poppy on Wed, 10 Jun 2020 08:47:33 +0200