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Attributes having a one value for a particular entity.
For instance, Age is a single valued attribute of a student entity.
Attributes that have more than single values for a specific entity is known as a multivalued attribute. Different entities may have dissimilar number of values for these types of attributes. For multivalued attributes we can also states the minimum and maximum number of vales that can be attached. For instance, phone number for a person entity is a multivalued attribute.
Explain the ACID properties of a transaction Ans: ACID properties are a significant concept for databases. The ACID stands for Atomicity, Consistency, Isolation, and Durability
what is natural join?
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
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CREATE TABLE prodtrans ( pno number (4) ptype char (1) CHECK (ptype in ('I','R','S')), qty number (5) FOREIGN KEY pno REFERENCES product (pno) ON DELETE CASCADE);
Explain Derived and Non-Derived Attribute? In few cases, two or more attribute values are related, for instance, Age and BirthDate attributes of a person. For specific person e
Project Description: Hi I'm seeking someone to make my dBase application work. I know it's not a 'modern' language but it's what I know. I have written an order program and I ne
A model in database system mostly defines the organisation of data or structure and a set of operations on that data. Relational model is a easy model in which database is represen
File Organisation In Dbms Introduction Databases are used to store information. Usually, the principal operations we have to perform on database are those relating to:
Database Errors: An error is said to have occurred if the implementation of a command to manipulate the database cannot be successfully finished either due to inconsistent data or
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