Computer Science - Class 12
Solutions to CBSE Sample Paper - Computer Science Class 12

(i) Define the term Domain with respect to RDBMS. Give one example to support your answer.

Answer

Answer by student

Domain is a set of values that a column can have in a table. For example, a domain of email addresses for a column that stores user emails.

Detailed answer by teachoo

  • Domain is a term used in relational database management systems (RDBMS) to describe the data type and constraints of a column in a table.
  • A domain defines the range of possible values that a column can store in a database . For example, a column that stores user emails can have a domain of email addresses.
  • A domain helps to maintain data integrity and consistency by preventing invalid or inappropriate values from being stored in a column.
  • A domain can be created using the CREATE DOMAIN command in SQL. The syntax is:

CREATE DOMAIN domain_name AS data_type

[ CONSTRAINT constraint_name CHECK (condition) ];

  • A domain can also be modified or deleted using the ALTER DOMAIN or DROP DOMAIN commands in SQL.

So, the correct answer is : Domain is a set of values that a column can have in a table. For example, a domain of email addresses for a column that stores user emails.

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.