What three data anomalies are likely to be the result of data redundancy? How can such anomalies be eliminated?
Answer to relevant QuestionsWhat is a surrogate key, and when should you use one?The dependency diagram in Figure Q6.8 indicates that a patient can receive many prescriptions for one or more medicines over time. Based on the dependency diagram, create a database whose tables are in at least 2NF, showing ...The table structure shown in Table P6.6 contains many unsatisfactory components and characteristics. For example, there are several multivalued attributes, naming conventions are violated, and some attributes are not ...Explain why it might be more appropriate to declare an attribute that contains only digits as a character data type instead of a numeric data type.Write a query to display the rental number, rental date, video number, movie title, due date, return date, detail fee, and number of days past the due date that the video was returned for each video that was returned after ...
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