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Database Links: Connecting Data Across Distributed Systems

What are database links in the reference of distributed system or distributed database technology? Database is a file that can be linked from the tables and their attributes included in the table. The database links provide the connection of data sharing to each other in the distributed system or distributed database models. The database links allow access to the information and retrieved from the database linked from the tables of other database files. The user can access information from single or multiple through query performance which is possible through the database links. This database link provides information according to the user’s locations to access their information quickly because the website is based on a distributed database model to provide data access from nearby and the user performs the query from the nearby server to the database. In the context of distributed systems or distributed database technology, database links are connections that allow a database to commun...

What do you mean by tuple and attribute? Discuss the role of the tuple and attribute in the Database? Why tuple and attribute are important in the database?

What do you mean by tuple and attribute? Discuss the role of the tuple and attribute in the Database? Why tuple and attribute are important in the database?

Tuple 

What do you mean by tuple and attribute? Discuss the role of the tuple and attribute in the Database? Why tuple and attribute are important in the database?

Image reference of the relational database example of tuple and attributes

In the image of relational database example diagram shows the tuple of table or relation, the tuple is called record of any object in the real. The attribute is also shown in the image of the relational database example, the attributes are shown such as student name, subject name are English, Physics etc. are the properties of the one record or tuple in the image relational diagram.


  • Tuples are the rows in the database.
  • It contains the records.
  • Records are the different to each other in the database.
  • Tuples have their properties in the rows containing records.
  • Records of the tuples are different to each other because of their features.
  • The different features of the records takes uniquely identify.
  • It can be manipulated.
  • It can be retrieve.
  • It can be update, select, insert and apply all operations which may be possible in the record.
  • It can be processed for optimizing in searching process.

Attribute

  • Attributes are the properties of the record of the tuple.
  • The attribute shows the records of the tuples are different to each other in the database.
  • In according to attribute the database can be separated and makes a new database.
  • In the attribute the calculus operations can be apply for processing the data of the record.
  • Key attributes can be applied in the fields of the records.
  • The primary key attribute can be uniquely identified of every record of the database.
  • The attributes helps to search easily of the record in the database.
  • It helps optimized the record with data of the description attribute.
  • Attributes shows the properties of the tuples.

Discuss the role of the tuples and attributes in the database?

  • Tuples of the database are one dimensional record.
  • Tuples are follows the one direction in the horizontal way.
  • Tuples holds every type of data types.
  • The entries of the attributes in the tuples are uses generally characters data type.
  • The entries of the attributes are unique in the database but same for every record of the data such as same gender, same department and same classes etc.
  • Database can be changed according to their attribute of the record.
  • Attributes are makes relationships to the other relational database.

Why Tuples and attributes are important in the database?

  • Tuple and attribute makes the two dimensional database.
  • Without tuple and attribute the database cannot be created and also the relational database.
  • The table DBMS are created by the tuples and attributes.
  • The cross section of the tuple and attribute makes cell in the table DBMS.
  • Tuple makes relation to other table database and attribute makes properties relations in the table DBMS to another database.
  • Attributes are makes group of the tuple of the record with their same attribute or properties or features.



Can a tuple be an unique record store information in a table?

Yes, it is true that the record is also known as tuple in the table structure that stores the unique data or information.
The record and tuple is properly defined with the unique attribute which is known as key attribute to define the record or tuple is unique from all the record or tuple created in the table.
The key attribute such as:- primary key is used to provide the unique value for the record to store unique value may be in numerical value or special character with number value or in a serial number to store and identify the value of record or tuple is unique from the table stored other record or tuple.
For example:- the tuple has a name, city and state of the user. But there is a primary key which is known as a key attribute to make a unique record or tuple from all tuples or records created in a table.
Such as:- primary key, name, city, state are the attributes or column in a table and here is the example below:
Primary key, name, city, state
145, Angela, Los Angeles, California.
453, Ravi, Indore, MP


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