C++ Commodity Management System

1. Brief introduction of the system Using C++ language, this paper designs and implements an inbound and outbound commodity management system suitable for supermarkets, which implements functions such as commodity purchase, sales, commodity classification, revenue management, order management, administrator and so on. 2. Systematic Hierarch ...

Added by Hiro on Thu, 18 Nov 2021 19:53:44 +0200

VUE quick start

VUE learning document Review: 1. What is the relationship between ES6, ES and JS 2,var,let,const 3. String function indexOf lastIndexOf charAt substr substring concat includes startswith endswith The template string will be displayed in whatever format it is written in 4. Deconstruction expression: assign the value of the array ...

Added by ParkerPHP on Wed, 17 Nov 2021 14:34:08 +0200

Synchronize mysql data to doris in real time, Mysql+kafka+flink+doris

1. Use background Recently, the group wants to build a set of real-time data warehouse in the existing environment. After comprehensive analysis, doris will be used as the database of real-time data warehouse. The data sources include message data and business database data. 2. Data source access It's easy to say the message data. Whether pu ...

Added by Knutty on Wed, 17 Nov 2021 08:58:01 +0200

Gtid master slave replication

1. Concept of gtid Global transaction id, one transaction of Gtid corresponds to one id, and during master-slave synchronization, the transaction id submitted on each master generates a unique transaction id when copied to the cluster.Instead of using master log file and master log POS to start replication, Gtid is used to replace the trad ...

Added by anxiety on Fri, 12 Nov 2021 15:19:30 +0200

Database index

Indexes 1.1 what does database index do? Database index is actually to make data query faster /*Check the important things and say them three times*/ 1.2 what are the database indexes? 1. Clustered index (primary key index). In the database, all rows will be sorted according to the primary key index 2. Non clustered index: index ordinary ...

Added by jcampbell1 on Fri, 12 Nov 2021 13:43:04 +0200

Medical database learning Chapter III actual combat

As the length of the last article is too long, I'll practice it alone. o by the way, it's better to use single quotation marks for the characters in mysql, otherwise an error may occur! Textbook exercises Suppose there is a database of students' course selection, which contains three relational patterns: student snosnamesexbirthspecialty201 ...

Added by fresch on Thu, 11 Nov 2021 02:02:22 +0200

Compile and install MySQL 8.0 on linux platform

Master MySQL installation from the root, and so on. Installing other c/c + + software through source code on linux platform is similar. ​ one   Installation mode The installation package of linux is divided into RPM package, binary package and source package. Different installation methods have their own advantages and disadvantages. Compa ...

Added by Zoran_Dimov on Tue, 09 Nov 2021 06:14:20 +0200

K8s demo cluster practice 21: MySQL 5.7.35 dual master multi slave GTID test

1, Test scheme Test in a virtual machine (first verify the scheme and configuration, and then deploy to K8S)Master1, port 3310, name mysqlm1, configuration file / opt/mysql/conf/mysqlm1.cnf, database directory / opt/mysql/m1databases, REPLICATION, user name m1slave, password 123456Master2, port 3311, name mysqlm1, configuration file / opt/ ...

Added by acrayne on Tue, 09 Nov 2021 03:28:18 +0200

Migrating from MySQL database to AWS DynamoDB

GO language -- migrate from MySQL database to Amazon DynamoDB 1, Foreword The blogger is learning the Go language. It happens that the Leader asked to study whether the migration from MySQL database to DynamoDB can be realized by script This blog post is a simple migration implemented by bloggers using Go language, because the code is no ...

Added by astoller on Mon, 08 Nov 2021 14:13:10 +0200

Distributed transaction - Seata - AT getting started

With the growth of data volume, the performance of a single database can no longer meet the requirements. Therefore, the method of database and table division was born to improve the access performance of RMDB. The problem caused by database division is that transactions cannot be controlled through a single DB connection (multiple database ...

Added by RightNow21 on Mon, 08 Nov 2021 01:16:59 +0200