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Official account of WeChat official account is developed. When users visit the public address, we usually store user account information to make records such as OPEN_ID, nickname, gender, city, country, head, attention state, etc. These WeChat official user parameter ...
Posted on Sun, 03 May 2020 21:02:27 -0400 by bdeonline
This semester is learning database. Some time ago, the teacher asked us to do 50 classic SQL statements. At that time, we did it faster. Some of them were Baidu's, and we didn't understand them very well.
So from the beginning of this essay, I will make 50 copies of classic SQL statements to deepen my understanding.
The answer is for reference ...
Posted on Sun, 03 May 2020 17:30:28 -0400 by ambivalent
Show details in table
Insert by command line
Insert by importing a local file
Modify data and delete data
Delete the NULL row
mysql> SHOW DATABASES;
| D ...
Posted on Sun, 03 May 2020 11:04:52 -0400 by azukah
The contents in brackets  can be omitted and added as required
Syntax: create database [if not exists] data name charset=gbk;
create database if not exists tow charset=gbk;
Query OK, 1 row affected
If not exists - > judge whether it is repeated
Charset = GBK - > simplified Chinese
Posted on Sun, 03 May 2020 09:04:02 -0400 by Farside
1. Use the Spring Boot default data source
1.1 introducing POM dependency
In pom files, we directly rely on the official spring boot start JDBC module or spring boot start data JPA module.
Posted on Sun, 03 May 2020 05:14:25 -0400 by Mijii
If you often look at the source code of open source projects, you will find that there is such a sentence in many Dispose methods: GC.SuppressFinalize(this); it may not matter if you have seen it once or twice, but if you have seen it for a long time, you will be interested. This article will talk with you.
1. Where did you find ...
Posted on Sun, 03 May 2020 04:27:25 -0400 by FrankHarley
JDBC: database connection of java
JDBC is essentially a set of API s, classes and interfaces defined by the development company
The mysql driver is used here, which is a set of class library and implements the interface
Driver class library, implement interface rewriting method, and operate database by driver
JDBC operation steps:
1. Registra ...
Posted on Sun, 03 May 2020 02:19:46 -0400 by StathisG
ubuntu mysql one click settings, tomcat self startup settings
There are many mysql settings and tomcat settings designed in recent working environments. These two scripts are listed one by one.
mysql one click Settings
After mysql is installed, you need to create the corresponding database, import the data file, an ...
Posted on Sun, 03 May 2020 00:26:44 -0400 by mark_kccs
This article mainly introduces how to use Yum to install MySQL under Linux
LSB Version: :core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch
Distributor ID ...
Posted on Sun, 03 May 2020 00:06:54 -0400 by thegame261
By default, the password of the newly installed mariadb is empty. You can log in to the database by directly entering mysql in the shell terminal.
If it is the first time you have just installed it, use the MySQL? Secure? Installation command to initialize it.
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED ...
Posted on Sat, 02 May 2020 21:55:51 -0400 by sri.sjc