While the relational model for databases appears to hold much promise,few commercial databases have implemented it.
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Q9: Which of the following is not true
Q10: _ was the developer of the relational
Q12: In the relational model,each row of a
Q13: A key that contains more than one
Q15: Which of the following is true about
Q16: To be considered a composite key,a key
Q17: Every cell in a relation can hold
Q18: Null values can cause problems because they
Q19: Which of the following terms is synonymous
Q96: Explain the terms relation,tuple,and attribute.
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