What characteristics do tables that conform to the concept of well-informed relations have?
Tables that conform to the concept of well-informed relations have the following characteristics:
1 . Each table represents a single subject.
2 . No data item will be unnecessarily stored in more than one table. This results in tables that have lower redundancies. The reason for this requirement is to ensure that the data is updates in only one place.
3 . All nonprime attributes in a table are dependent on the primary key alone. The reason for this requirement is to ensure that the data is uniquely identifiable by a primary key value.
4 . Each table is void of insertion, update, or deletion anomalies, which ensure the integrity and consistency of the data.
You might also like to view...
Wikis, websites, blogs, podcasts, and similar technologies can contain a "feed" that allows you to subscribe to the contents and get updates regularly
Indicate whether the statement is true or false
Investor A owns 10% of the common stock of IDE Corporation. After IDE completes a 2-for-1 stock
split, Investor A will own 20% of the common stock of the corporation. Indicate whether the statement is true or false
Suppose an actual census showed that 18.4% of the households in California have incomes in excess of $50,000 . What is the probability that the sample proportion will be 0.22 or greater for a random sample of 750 households from a city population which totals 10,000?
a. 0.0055 b. 0.9945 c. 0.9949 d. 0.0041 e. Not enough information given for estimation.
If A and B are mutually exclusive, then a. P(A) + P(B) = 0. b. P(A) + P(B) = 1. c. P(A ? B) = 0
d. P(A ? B) = 1.