I am a sophomore major in Internet of Things Engineering, and a small wave in the Internet. Blogging is to record my learning process, and I hope to help many of them in their infancy.Linyuan admires fish, so it's better to go back and make a net.Let's come on together!
Blog Home Page: https://blog.cs ...
Posted on Mon, 15 Jun 2020 21:41:25 -0400 by SsirhC
quick get start
Official website document address: https://baomidou.gitee.io/mybatis-plus-doc/#/install
To use a third-party component:
1. Import corresponding dependencies
2. Study how dependencies are configured
3. How to write code
4. Improve the ability to expand techn ...
Posted on Sun, 14 Jun 2020 22:51:17 -0400 by nadman123
When writing SQL, we often flexibly use some skills of SQL statement writing, which can greatly simplify the program logic. Reduce the number of interaction between the program and the database, which is conducive to the high availability of the database. At the same time, it can also appear that your SQL is very good, so that colleagues can se ...
Posted on Sun, 14 Jun 2020 04:44:28 -0400 by Hagbard
Install MongoDB and start server
1.Download mongoDB service: (version 3.1.2)
2. Install - > select custom - > install next
3. Create a new empty directory on the local disk. The location should not be too deep. For example, C:\db is used to store data files
4. Run mongoDB service: enter the bi ...
Posted on Sat, 13 Jun 2020 03:30:44 -0400 by andy75180
Slow Query Log
Understanding slow queries
mysql's slow query is a type of log record provided by mysql that records statements whose execution time exceeds the set threshold.This time-out is configurable, and the default time-out is 10s, which is then written to the log.Then combined with explain to ...
Posted on Fri, 12 Jun 2020 22:13:07 -0400 by john9292
This series will introduce how to realize step-by-step voice conversation in mp4 video, automatically convert it to text, and output it to word document. In the first part of this article, the video to audio processing is completed first. Open source code address of the project thomas project
Overall technical structure
The following figure sh ...
Posted on Fri, 12 Jun 2020 03:12:12 -0400 by nagasea
Today, let's practice how to optimize the SQL statements of two or more tables combined query.
Let's create two tables and prepare some data first
create table teacher(
tid int(4) primary key,
cid int(4) not null
insert teacher values(1,2);
insert teacher values(2,1);
insert teacher values( ...
Posted on Fri, 12 Jun 2020 02:24:32 -0400 by grumpy
MySQL Clone Plugin(8.0.17 +)
1, What is a clone plug-in?
Allow copying data from a local or remote MySQL server instance
It can take a physical snapshot of InnoDB's schemas, tables, tablespaces, and data dictionary metadata
Supports replication, such as for MGR
2, Using the clone plug-in
2.1 installing the clone plug-in
# Mode 1: ...
Posted on Fri, 12 Jun 2020 02:23:59 -0400 by douga
Transaction processing of multiple data sources is a common topic. Transaction management across two data sources is also a category of distributed transactions. In the same JVM, transactions of multiple data sources are processed. The classic processing scheme is JTA (java standard transaction abstraction based on XA Protocol Modeling) ...
Posted on Thu, 11 Jun 2020 00:37:28 -0400 by ceruleansin
From the beginning of this chapter, we learn about Spring Cloud Alibaba related micro service components.
Introduction to Spring Cloud Alibaba
Spring Cloud Alibaba is committed to providing a one-stop solution for microservice development. This project contains the necessary components for developing distributed application m ...
Posted on Wed, 10 Jun 2020 01:16:22 -0400 by jnewing