Question: Based on the following three datasheet tables, please draw an ERD in crows foot notation with the entities, identified keys, attributes, relationships and cardinalities. For

  1. Based on the following three datasheet tables, please draw an ERD in crows foot notation with the entities, identified keys, attributes, relationships and cardinalities. For your convenience, you can use the square boxes given under the datasheet tables to start the drawing. Alternatively, you are permitted hand draw the ERD and paste the diagram into this paper or use any tool of your choice to draw the diagram. You can also specify the relationships and the related cardinalities in words if you are not able to draw them in ERD. (5 marks)

INVOICE

INV_NUMBER

CUS_CODE

INV_DATE

1001

10014

16-Mar-13

1002

10011

16-Mar-13

1003

10012

16-Mar-13

1004

10011

17-Mar-13

1005

10018

17-Mar-13

1006

10014

17-Mar-13

1007

10015

17-Mar-13

1008

10011

17-Mar-13

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