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Data Flow Diagram Level 1 - Essay Example

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There are various constraints implemented on the identifier of the entity include: the identifier should not be null, contains only unique values and…
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Data Flow Diagram Level 1

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Download file to see previous pages Two relationships have been added in the above diagrams which were not given in figure 7-20 include: one and only one customer can perform zero or many transactions at a time and only one customer could have zero or many coupons at a time. The remaining relationships are the same as described in the given figure. However, the minimum cardinalities have been added i-e zero or one with many entities as shown in the above ...Download file to see next pagesRead More
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