Скачать или смотреть 2.5- What Is Relationship Sets In E-R Model In DBMS | Relationship Set In DBMS In Hindi

2.5- What Is Relationship Sets In E-R Model In DBMS | Relationship Set In DBMS In Hindi

Please Follow Playlist For Complete Chapter - Link Is Under Description

PLAYLIST:
DBMS - Data Base Management System Tutorials In Hindi | GATE- NET- DBMS Lectures in Hindi
   • DBMS Complete Syllabus- All University exa...  

dbms tutorials,
dbms tutorials in hindi,
dbms lectures,
dbms lectures in hindi,

entity in dbms,
erd database,
er database,
relational database model diagram,
er diagram in database management system,

#gatedbmslecturesinhindi,
#ugcnetdbmslecturesinhindi,
#gatedbmslectures,
#ugcnetdbmslectures,

1. Relationship : A relationship is the association among several entities. It connects
different entities through a meaningful relation.
2. Relationship Set : A relationship set is a set of relationships of the same type.
Consider an example, employees work in different departments. Then relationship exists
between employees and departments because each employee must belongs to some department.
Relation of all employees with department when combined makes the relationship set because
each employee has same kind of relation with departments.
Employee Works_in Department
e1
e2
e3
e4
r1
r2
r3
r4
d1
d2
FIGURE 2.3. Binary relationship set.
Here, Employee and Department are two entity sets. r stands for relationship between
Employee and Department. Works_in is the relationship set as shown in Figure 2.3.
 Descriptive Attributes : Attributes of any relationship set are known as descriptive
attributes Notes Link:
http://www.tutorialsspace.com/Downloa...