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Engineering
Computer Science
ER Diagram of Online Sales System Product PK ProductID FK1 OrderID DepartmentID Product Name Price Cutomer Order PK CustomerID PK OrderID Full Name FK1 CustomerID FK2 StorelD Sales Amount Store Date --H- PK StorelD Time Store Name

ER Diagram of Online Sales System Product PK ProductID FK1 OrderID DepartmentID Product Name Price Cutomer Order PK CustomerID PK OrderID Full Name FK1 CustomerID FK2 StorelD Sales Amount Store Date --H- PK StorelD Time Store Name

Np Ms Office 365/Excel 2016 I Ntermed
Np Ms Office 365/Excel 2016 I Ntermed
1st Edition
ISBN:9781337508841
Author:Carey
Publisher:Carey
Chapter7: Developing An Excel Application
Section7.1: Excel Application And Defined Names
Problem 2QC
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Question

Consider the ER diagram of online sales system above. Based on the diagram answer thequestions below,

 

1.  Mention the relationship between the Order and Customer Entities. You can use the following: 

1:1, 1:M, M:1, 0:1, 1:0, M:0, 0:M

2.  Which one of the 4 Entities mention in the diagram can have a recursive relationship?

3.  If a new entity Order_Details is introduced, will it be a strong entity or weak entity? If it is a weak entity, then mention its type (ID or Non-ID, also Justify why)?

 

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ER Diagram of Online Sales System Product PK ProductID FK1 OrderID DepartmentID Product Name Price Cutomer Order PK CustomerID PK OrderID Full Name FK1 CustomerID FK2 StorelD Sales Amount Store Date --H- PK StorelD Time Store Name
Transcribed Image Text:ER Diagram of Online Sales System Product PK ProductID FK1 OrderID DepartmentID Product Name Price Cutomer Order PK CustomerID PK OrderID Full Name FK1 CustomerID FK2 StorelD Sales Amount Store Date --H- PK StorelD Time Store Name
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