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Tag: database

VB.NET – Connect to Access Databases with Database Passwords

I have a password protected mdb file but I cannot access it on vb.net. I don’t know the correct code to define the password.
This is my current code, I I know its error, but I don’t know the corre

October 6, 2021By Simo Visual Basic Access, connection, Cryptography, database, VB, VB.NETLeave a Comment

MySQL creates a database

After logging in to the MySQL service, we can use the create command to create a database. The syntax is as follows:

CREATE DATABASE database name; The following command simply demonstrates t

October 4, 2021By Simo Mysql Created, database, mysqlLeave a Comment

Practical mysql database command

Connect: mysql -h host address -u user name-p user password (Note: u and root need not add spaces, the other is the same)
disconnect: exit (Enter) Create authorization: grant select on database.*

October 4, 2021By Simo Mysql Command, database, mysql, practicalLeave a Comment

MySQL – Implement the hierarchical data structure in the database

I know there are two methods: adjacency list and nested tree. It is said that due to a large number of queries, the adjacency list will be slow to traverse. But I don’t know any actual numbers in t

October 4, 2021By Simo Mysql data, database, hierarchical, Implementation, Medium, mysql, structureLeave a Comment

Access MySQL Remote Databases from Command Line

I have a server with Rackspace. I want to access the database from the command line of the local machine.

I have tried:

mysql -u username -h my.application.com -ppassword But it gave an

October 4, 2021By Simo Mysql Access, Command Line, database, mysql, remoteLeave a Comment

Use version control (GIT) on the MySQL database

I am a WordPress designer/developer, and he is increasingly involved in the use of version control, especially Git, although I use SVN in some projects. I currently I am using Beanstalk as my remot

October 4, 2021By Simo Mysql control, database, git, mysql, usage, versionLeave a Comment

MySQL Delete Database

Use ordinary users to log in to the MySQL server. You may need specific permissions to create or delete MySQL databases, so we use the root user to log in here, and the root user has the highest pe

October 4, 2021By Simo Mysql database, delete, mysqlLeave a Comment

Use PyCharm to operate MySQL database

Install PyMySql template

pip install pymysql

Configure MySQL connection parameters

pymysql.Connect()

host , Post, user, passwd, db, charset

Get cursor() object

c

October 4, 2021By Simo Mysql database, mysql, operation, Pycharm, UsingLeave a Comment

MySQL Database Application (5) SQL Language (2)

3. Delete redundant accounts in the MySQL system

Syntax: drop user “user “@”Host Domain” <----Pay attention to the quotation marks, which can be single or double quotation marks, but they can

October 4, 2021By Simo Mysql application, database, Language, mysql, SQLLeave a Comment

Remember to deal with the experience of the mysql database

One day, the user table in the production environment suddenly locked the table for no reason. I thought it was just an occasional bug. So the first solution that came to my mind was simple and rud

October 4, 2021By Simo Mysql database, experience, lock, mysql, no reason, once, process, remember, tableLeave a Comment

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