CHAPTER_4_Example_Sheet[1]

CHAPTER_4_Example_Sheet[1] - C HAPTER 4: Cardinality...

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Unformatted text preview: C HAPTER 4: Cardinality Question and Answer Example: M I N = W ill either be a “0” or a “1”. “0” means it is independent and exists without the help of the other entity. “1” means it is dependent on the other entity to function. M AX = W ill either be a “1” or “N”. “1”means the entity can only happen one time (one:one r elationship). “N” means many and the entity can have multiple interactions with the other entity. (one:many relationship) 1.) Can at least one instance of Revenue exist without a related instance of Cash Receipt? (MIN QUESTION) Answer: Yes, “0” means it is independent and can exist without a cash receipt. 2.) Can at least one instance of Cash Receipt exist without a related instance of Revenue? (MIN QUESTION) Answer: No, “1” means i t is dependent on Revenue to function. 3.) Can at least one instance of Revenue involve more than one Cash Receipt? ( MAX QUESTION) Answer: Yes, “N” means Revenue can involve more than one receipt. 4.) Can at least one instance of Cash Receipt involve more than one Revenue? ( MAX QUESTION) Answer: No, “1” means Cash Receipt can only involve one revenue at a t ime. ...
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CHAPTER_4_Example_Sheet[1] - C HAPTER 4: Cardinality...

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