1, jdbc connection to mysql above 8.0
After the mysql version above 8.0 is updated, the corresponding jdbc connection has also changed.
First of all, we need to configure the mysql environment. It is recommended that you go to the Internet to find a tutorial and follow it. I won't talk about the installation and configuration of mysql here.
Posted by mjl4975 on Fri, 20 May 2022 03:06:37 +0300
The lamp architecture based on apache is one of the mature enterprise website application modes and one of the highest market share in the market. Learning to deploy a basic lamp architecture can be the start of our in-depth study and understanding of the more complex architecture.
1, LAMP overview
LAMP architecture is one of the ...
Posted by ShimmyShine on Fri, 20 May 2022 01:48:27 +0300
1, Environmental installation
The first is the installation of MySQL, which is directly installed only with apt get command (this method is recommended here, because it does not need to link the relevant path when compiling later programs)
sudo apt-get install mysql-server
After my installation, the relevant header files and dynamic lib ...
Posted by posidon on Fri, 20 May 2022 01:31:35 +0300
Author: Yao yuanFocus on Oracle and MySQL databases for many years, Oracle 10G and 12C OCM, MySQL 5.6, 5.7, 8.0 OCP. Now Dingjia technology serves as a consultant to improve database training and technical support services for colleagues and customers.Source: original contribution*It is produced by aikesheng open source community. The original ...
Posted by BrianWald on Wed, 18 May 2022 22:57:05 +0300
Main function: the applet obtains the user's openid as the user's unique identification code.
Function Description: the reason to obtain the openid of the user is that it has unique identification and is used as the unique identification to identify the user. With a unique ID, we can know who used our applet. The rules formulated by wechat mak ...
Posted by jlp09550 on Wed, 18 May 2022 15:48:25 +0300
1. Import jar package
Copy the jar to the lib directory, right-click the jar package - [Add as Library] and import it into the project
2 operation steps (addition, connection, language, execution and interpretation)
2.1 loading registration driver
Register the Driver through the following statement. The principle is that this statement will Cl ...
Posted by Pr0digy on Wed, 18 May 2022 08:08:51 +0300
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
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-18.104.22.168:3307] 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
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
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
Download: https://downloads.mysql.com/archives/community/ Select the version and ...
Posted by osiris1603 on Mon, 16 May 2022 17:00:40 +0300