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Describe the role of social media sites in digital communication technology?

Describe the role of social media sites in digital communication technology? Social media sites provides many types of ways to share and allow to send different types of data such as:- text data through file of text document or direct message text to the chat box directly to the user by typing, the audio clip can be recorded to send the file or direct voice calling system allows to connect with the user when the user is online. Similarly, video data can be shared to the user in the form of a file and directly connected in the form of video call or video chatting. The image file can be used to share the information object which is still object information including text data depending on the creators. The social media sites provide the services of connecting users through the data communication system using the different types of option such as:- chatting using text messages, audio clipping sends methods, recorded current video through the camera or direct video call or chat option, voi...
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what do you understand by the key attribute in the relational model?

What do you mean by key attributes in the relational model?

Key attributes in the relational database

  • The key attributes are the properties to separate the record in a unique or consistency form in the database of relational model.
  • When we applying the keys attributes on the relation the keys identify the records which has a specific value.
  • The key attributes are uses to find the characteristics of the records in the database.
  • As comparison to find the records by manually that is too slow to find the records.
  • The key attributes allows the consistency of the records when we apply on the database.
  • There are some types of key attributes in the database management system in the relational database. Such as primary key, composite key, super key, candidate key, foreign key and secondary key are uses in the relational model.
  • All of the key attributes are uses to uniquely identify the record in the relation.
  • All names of key attributes are related to their work.

Points to be remember about the key attributes in the relational model

  • It uses to separate the records from the database and identify.
  • It allows the consistency of the records form the database.
  • It is uses to find the records by using query to apply on the database.
  • If you have not unique identity to find your record in the relation you can use other properties such as two or more attributes combination to find the record by using query for key attribute. 

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