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Q. |
Given the basic ER and relational models, which of the following is INCORRECT? |
A. | an attribute of an entity can have more than one value |
B. | an attribute of an entity can be composite |
C. | in a row of a relational table, an attribute can have more than one value |
D. | in a row of a relational table, an attribute can have exactly one value or a null value |
Answer» C. in a row of a relational table, an attribute can have more than one value |
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