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E r diagram
1.
Entity-Relationship Diagram
2.
Conceptual Data Model) E-R
3.
4.
Strong entity Weak entity Associative
entity*
5.
6.
Single-valued attribute Multi valued
attribute Derived attribute
7.
8.
9.
10.
11.
Simple Attribute Composite Attribute
12.
13.
Relationship Identifying Relationship
14.
Unary
entity instance entity type
15.
Binary
entity instance 2 entity type
16.
Ternary
entity instance 3 entity type
17.
Cardinality Constraints Participation Constraints
18.
3 One-to-one relationship One-to-many relationship many-to-many relationship
19.
One-to-one relationship 1 1
20.
One-to-many relationship 1 M
21.
many-to-many relationship M N
22.
Total Participation ( ) Partial Participation ( ) Total Participation Partial Participation M N
23.
24.
Entity Relationship Diagram Primary key
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