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Each simple attribute of an entity type is associated with a value set (or domain of values), which specifies the set of values that may be assigned to that attribute for each individual entity. If the range of ages allowed for employees is between 16 and 70, we can specify the value set of the Age attribute of EMPLOYEE to be the set of integer numbers between 16 and 70. Similarly, we can specify the value set for the Name attribute to be the set of strings of alphabetic characters separated by blank characters, and so on. Value sets are not displayed in ER diagrams, and are typically specified using the basic data types available in most programming languages, such as integer, string, Boolean, float, enumerated type, sub-range, and so on.
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What are the characteristics of DBMS?
Database management system is full form of DBMS . Characteristics of a DBMS are following : 1) It maintains data integrity. 2) It reduces redundancy. 3) make access to data easy.
Who are actors on the scene in DBMS?
SOURCE: http://jeenuutreja.blogspot.in/2012/07/actors-on-scene-in-dbms-in-this-topic.htmlI'd copy paste this here but these guys have earned a visit!
A constant is a factor that?
It does not change its value whatever the value of the variables, under a given set of conditions.
What is the value of your 12 plate Bradford Exchange set of Beauty and the Beast?
complete set with papers of authenticity and in mint condition value would be between $1000 to $1200
What is the value of an us 1942 proof set?
As of 12/2008, Numismedia quotes the fair market value (FMV) at $18.00
What is attribute value in DBMS?
Values of columns
What value is the one that a DBMS initially displays in a field?
a default value
What are the set of operation in dbms?
Relational set operators in dbms uses algebra to manipulates contents in a data base. there are many different operation in Dbms ,they are :- 1.Union 2.intersect 3.Product 4.select 5.Project 6.divide
What are the basic concepts of DBMS?
DBMS stands for DataBase Management System. The main concepts are the structure, the manipulation, and a set of integrity rules.
What is meant by specialization dbms?
the process of designating subgroupingswithin an entity set
What is meant by specialization in dbms?
Specialization in DBMS refers to the process of dividing a superclass into multiple subclasses based on specific characteristics. Each subclass inherits attributes and relationships from the superclass, allowing for more specific data modeling and organization. Specialization helps to represent complex data structures in a more organized and efficient manner.
if you want to disign new DBMS to any organization first you must set of requiments and set of features that DBMS product must provide to fill requiments. discribe the process of evaluating and selecting the best DBMS product. ?
Know what you need and check each need is met by the product
Why duplicate tuples are not allowed in DBMS?
Since relation is a set, and tuples are element of a set, according to set theory, the elements of a set are not ordered.
What is set of steps completed by a dbms to accomplish a single user task?
transaction
What ensures the value of the foreign key matches another tables primary key?
It is the DBMS that ensures the value of the foreign key matches another table's primary key when referential integrity constraints are enabled within the DBMS
What is modality in DBMS?
when a relationship is optional then the value of the modality is zero. when mandatory then the modality is one.
What is intension in dbms?
In database management system (DBMS), intension refers to the structure or schema of the database. It defines the overall design and organization of the database, including tables, columns, data types, constraints, and relationships. It serves as a blueprint for creating and managing the database.
