#Lec13
This video is very useful for all students who are preparing
for the exams like(like GATE, NTA NET, NIELIT, PSU, DSSSB, KVS, Htet).
Lecture by Nagarajan.S
An attribute is a property or characteristic of an entity. An entity may contain any number of attributes. One of the attributes is considered as the primary key.
An ER diagram shows the relationship among entity sets. An entity set is a group of similar entities and these entities can have attributes. In terms of DBMS, an entity is a table or attribute of a table in database, so by showing relationship among tables and their attributes, ER diagram shows the complete logical structure of a database. Lets have a look at a simple ER diagram to understand this concept.
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