Which symbol denote derived attributes in ER Model?

Double ellipse
Dashed ellipse
Squared ellipse
Ellipse with attribute name underlined

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 2 : Dashed ellipse

Concept:

An attribute that can be derived from other attributes of the entity type is known as a derived attribute, derived attribute is represented by a dashed eclipse.

Explanation:

In the ER model,

Option 1: Double ellipse

[ alt="F1 R.S M.P 16.08.19 D12" src="//storage.googleapis.com/tb-img/production/19/08/F1_R.S_M.P_16.08.19_D12.png" style="width: 43px; height: 51px;">

Multivalued attribute

Option 2: Dashed ellipse

[ alt="F1 R.S M.P 16.08.19 D14" src="//storage.googleapis.com/tb-img/production/19/08/F1_R.S_M.P_16.08.19_D14.png" style="width: 36px; height: 69px;">

Derived attribute

Option 4: Ellipse with attribute name underlined

[ alt="F1 R.S M.P 16.08.19 D13" src="//storage.googleapis.com/tb-img/production/19/08/F1_R.S_M.P_16.08.19_D13.png" style="width: 37px; height: 69px;">

Key attribute

4 views Answered 2022-09-04 04:29

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