For a long time, I have been using the MSSQLServerAccess database. I have hardly encountered any trouble in accessing MS through. NET. Recently, I used Oracle as a database in my project. I learned some things about. NET accessing Oracle and found
Because the project often needs to export the customer's on-site data to the company's development environment, as the customer's on-site data volume increases, the original export and import method takes longer and longer time, test the RMAN
Since its birth, database technology has formed a solid theoretical foundation in less than half a century.
Since its birth, database technology has formed a solid theoretical foundation in less than half a century.
Since its birth, technology
The complexity and frequency of data interaction increase, leading to performance problems in the database O & M, migration, and scaling processes. As a key technology to ensure the healthy operation of basic IT components, the path to database
This article describes how to use the ONDUPLICATEKEYUPDATE command in mysql. You can use this syntax to determine whether a record exists when inserting a record. If not, insert the record. Otherwise, update the record, which is convenient, you do
During data development, we often need to identify duplicate records in the database or directly Delete duplicate records in the database. Below I will summarize some methods for you. If you need them, please refer to them.
During data development,
A friend may encounter a 10061 or 1045 error or 2003-Can't connect to mysqlon 192 when using Navicatformysql to remotely connect to the mySql database. 168.1.2 '(10061), because MySQL does not allow remote connection.
A friend may encounter a 10061,
Today, we will introduce the mysql full-text search application. The storage engine type of the full-text search table must be MyISAM. Otherwise, full-text search is not supported.
Today, we will introduce the mysql full-text search application. The
Using logs to recover data is generally caused by your failure to effectively and reasonably back up the database. However, if you want to restore logs in advance, you must enable mysql logs, otherwise, logs cannot be backed up.
Using logs to
In mysql, apart from creating and deleting databases, we also need to create and delete data tables. The following describes how to use the command line to create and delete data tables.
In mysql, apart from creating and deleting databases, we also
Next I will introduce some methods for changing the password of mysql. The simplest is to modify the password of mysql directly in phpmyadmin or command mode, the other is to change the password in command mode.
Next I will introduce some methods
Modifying and adding user passwords is one of the most basic functions in mysql database management. The following describes how to modify user passwords and set user permissions.
Modifying and adding user passwords is one of the most basic
There are many methods to connect to the database in mysql. If you download the connection directly in mysql command mode, we can divide it into a local connection and a remote connection, and the other is to connect in php mode, I will introduce it
This is an entry-level mysql tutorial. Here we will introduce the mysql database creation and deletion commands. If you have any questions, please refer to them.
This is an entry-level mysql tutorial. Here we will introduce the mysql database
In mysql, random data query is a commonly used function, but if this random query function is not used well, your database will be stuck, especially to a few hundred thousand, more attention should be paid to the case of millions of data. The
In our development, database backup is a very important part. Let's share two php backup mysql database classes. If you have any need, you can modify them.
In our development, database backup is a very important part. Let's share two php backup
MYSQL performance optimization has always been a headache. At present, most of them directly use html static pages or cache technology. I will share with you the performance optimization of mysql.
MYSQL performance optimization has always been a
To import a large database to mysql, if you have service management permissions, download and package the data you want to copy in the mysqldata directory, and put it in the data directory to be imported, however, if you do not have this permission,
A trigger is an event that triggers an operation. These events include INSERT statements, UPDATE statements, and DELETE statements.
A trigger is an event that triggers an operation. These events include INSERT statements, UPDATE statements, and
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