What is a database and how does it work?

A database is just a collection of data. But this is not just any data collection. It is a collection of data that has been organized in a way that facilitates data retrieval. If you were to store all your friends' names, addresses, and phone numbers in a shoebox, you'd still have a database. But it would be quite difficult to find someone's phone number. That's why we use database management software. It acts as an intermediary that organizes the data and helps us recover it. Database management software has been around since the 1960s .

It has been used in the banking industry for decades. It is also used in other industries such as insurance and healthcare. But database management software isn't just for large companies. It is also used by small businesses and individuals. You can set up a database to store contact information, financial information, and just about any other type of data.

Databases also allow us to store large amounts of information, such as images, text, number in a few words a type of data. These, in addition to being quick to consult the information, are capable of working with any type of programming. They can be adapted to a server and made to work using the http protocol.

Example of database management engines:

  • MySQL
  • PostgreSQL
  • SQLite
  • Oracle

 

Free Datacenter Vector GraphicsHow does a database work?

A database works through queries, and through a manager of the same engine that manages the file from where the information status is stored, processed and monitored.

The database works through the manager that is capable of responding to instructions through the SQL language and queries, the queries can be made through a programming language, for example, in JAVA it uses a driver that connects to the database host , this driver is called JDBC and in the programming language it is interpreted as a library, so they are sent to call or make queries through requests of that protocol. The driver can be easily obtained from the oracle page.

  1. Select Queries – Select queries are used to retrieve all data from a table. They can also be used to retrieve only some of the data from a table.

Select queries are used to retrieve all data from a table. They can also be used to retrieve only some of the data from a table. 2. Update queries – Update queries are used to make changes to data in a table. They can be used to add or delete data.

For example, suppose you want to find the total cost of your Amazon purchases in the last month. You can do this by entering the data into a table. You can then use a query to add up the total cost of Amazon purchases. That query would look like this:

SELECT (s.amount) FROM Amazon.shopping_cart AS s WHERE s.date> date ("ahora", "- 30 días") Y s.date <date ("ahora", "-10 días")

Third, you can export the data to a file. This is useful if you want to save the data for use in another application, or if you want to use the data in another database.

Data migration

Data migration is the process of moving data from one database to another. It is useful if you want to use the data in another database. For example, you may want to use the data in a database on your computer. But you may also want to use the data in a database on your phone.

Free vector graphics of Database Schema

Database management systems are administrators who are in charge of provisioning tables in storage and keeping the databases available to be consumed by an application service.

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