Software testing environment -- install MySQL on Linux (detailed), fine sorting

1, Foreword Several common ways to install software on Linux: Source code compilationDecompress the compressed package (generally tar.gz)Compiled installation package (RPM, DPKG, etc.)Online installation (YUM, APT, etc.) The convenience of the above methods increases in turn, but the versatility decreases in turn Delete the development ...

Posted by parkej60 on Wed, 18 May 2022 02:16:56 +0300

Debezium specifies binlog location to initialize exception troubleshooting and repair

Abnormal phenomenon Recently, the project needs to use Debezium to specify the binlog location to read data. When FileDatabaseHistory is configured to save offset, an unrecognized schema exception will appear. 14:52:18.237 [blc-9.135.12.10:3307] ERROR io.debezium.connector.mysql.MySqlStreamingChangeEventSource - Encountered change event ' ...

Posted by jasonscherer on Wed, 18 May 2022 01:40:00 +0300

Cache mechanism under Mybatis concurrency

Cache mechanism under Mybatis concurrency Mybatis level 1 and level 2 cache Level 1 cache: It is enabled by default. For multiple identical operations in a session, only the first time will go to the database to query, and then directly go to the cache to get the data! 1. Query the record for the first time, and write the queried data into th ...

Posted by miramichiphoto on Mon, 16 May 2022 18:49:30 +0300

Xiaozha's learning notes python day54 [MySql] (2020-09-09 18:12)

Database DB The database itself supports concurrent network operations Using database to add, delete, check and modify data is more efficient than storing data in files Each folder is a database Database management system DBMS: sqlserver MySQL Oracle install Download: https://downloads.mysql.com/archives/community/ Select the version and ...

Posted by osiris1603 on Mon, 16 May 2022 17:00:40 +0300

Read MySQL index structure and query optimization

Review the previous: Learn the explain tool of MySQL (at the same time, it is emphasized again that these articles on MySQL are based on version 5.7, and the relevant conclusions and conclusions are not necessarily applicable to other versions) MySQL official documents( https://dev.mysql.com/doc/refman/5.7/en/optimization-indexes.html )There is ...

Posted by jamkelvl on Mon, 16 May 2022 11:45:34 +0300

Issue 17 - what is MySQL database? It's enough to read this dry article!

preface Why study MySQL? Because MySQL is one of the most popular relational database management systems, MySQL is the best software in web applications. The sql language used by MySQL is the most commonly used standardized language for accessing databases. Rest assured, friends who read this issue are suitable for: website development, softwar ...

Posted by keigowei on Mon, 16 May 2022 11:38:44 +0300

Go launched http2 0 request flow analysis (later) - header compression

Reading suggestions This is HTTP 2 0 series, the author recommends reading in the following order: HTTP request in Go -- http1 1 request process analysis Go launched http2 0 request process analysis (previous) Go launched http2 0 request flow analysis (Part 2) -- data frame & flow control review In the previous article (* http2clientco ...

Posted by brandone on Mon, 16 May 2022 09:17:40 +0300

SQL statement learning

SQL statement Query statement select SELECT column_name,column_name FROM table_name [WHERE Clause] [LIMIT N][ OFFSET M] select is a query statement, followed by commas to separate multiple columns, and * indicates all columns Which form is it from after from where add conditional restrictions Limit limit the number of displays Offset indic ...

Posted by Sgarissta on Mon, 16 May 2022 03:42:58 +0300

Java springboot based online ordering and takeout platform website (java+springboot+vue+mysql)

Operating environment: Development tools: IDEA /Eclipse Database: mysql5 seven Application service: Tomcat7/Tomcat8 Using the framework springboot+vue Project introduction For the design of the ordering platform website, the system development mainly adopts java language technology and applies MySQL database to complete data storage in the d ...

Posted by drums on Sat, 14 May 2022 22:16:22 +0300

3-minute essay: I've never met before. Introduction to Laravel database model

introduction The framework without model is not flexible! Each framework will carry out in-depth design for the database, In order to quickly add, delete, modify and check SQL, abstract the repeated work and improve the efficiency of application development. In this issue, we will talk about the initial use of laravel's model. Code time The mo ...

Posted by verano on Sat, 14 May 2022 06:02:55 +0300