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In dbms with m attributes 2^m-1 keys are possible.
BY-ROHIT
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∙ 10y ago
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Dbms degree or arity?
Arity=#attributes
What is cardinality in dbms?
Cardinality is the number of attributes in the table.
What is the prime attribute in DBMS?
prime attributes are the attributes of a candidate key which will give uniqueness. a candidate key is (the subset of superkey) which gives uniqueness. Super key is the maximum set of attributes that can provide uniqueness example ABCDE is a super key AB CD DE are the candidate keys s.t. AB is the primary key. CD and DE are the secondary/alternate keys.
What are rows in dbms?
In DBMS the data is stored in the form of table . Each row in DBMS is known as tuple.
How does DBMS reduce data redundancy?
DBMS stands for database management system. DBMS reduce data redundancy as it checks if the data is duplicate and if duplicate then store it as a single record.
What are the types of dbms attributes?
Types of Attributes in Dbms areKey or non key attributesRequired or optional AttributesSimple or composite AttributesSingle-valued and multi-valued AttributesStored, Coded or derived Attributes
Dbms degree or arity?
Arity=#attributes
What is cardinality in dbms?
Cardinality is the number of attributes in the table.
What is class in DBMS?
class in dbms is nothing but a collection of attributes.... class in java is defined as collection of objects....:D
What is the prime attribute in DBMS?
prime attributes are the attributes of a candidate key which will give uniqueness. a candidate key is (the subset of superkey) which gives uniqueness. Super key is the maximum set of attributes that can provide uniqueness example ABCDE is a super key AB CD DE are the candidate keys s.t. AB is the primary key. CD and DE are the secondary/alternate keys.
Define attribute in dbms?
In DBMS a table contains one or more columns there columns are the attribute in DBMS FOR EXAMPLE---say you have a table named "employee information"which have the following columns ID,NAME,ADDRESS THEN id ,name address are the attributes of employee..................
Explain different types of attributes with example in DBMS.?
Different types of attributes in DBMS are:Key or non key attributesRequired or optional AttributesSimple or composite AttributesSingle-valued and multi-valued AttributesStored, Coded or derived Attributes
Major difference between dbms vs rdbms?
A DBMS (Database Management System) is a software that manages databases and provides functionalities to store, retrieve, and update data. An RDBMS (Relational Database Management System) is a type of DBMS that stores data in a structured way using tables with relationships between them. RDBMS enforces the relational model, which allows for data integrity through constraints and supports SQL for querying data.
What is the difference between a key and a superkey in DBMS?
I am supposing that key means primary key.Superkey is any subset of attributes that uniquely identifies the tuples of a relation. This subset need not be minimal, that is, one can remove some attributes from it and it is still uniquely identifying. If all redundant attributes are removed you get a subset what is called primary key.
Define key in dbms with example?
Supper Key- s a set of one or more attributes that taken collectively and allow us to identify entities with in entity set.
What are highlights of DBMS?
NA_ what are highlights of advanced DBMS what are highlights of advanced DBMS what are highlights of advanced DBMS
Is java DBMS?
no, Java is not dbms.. Java is a programming language Dbms is database
