When building a database from an existing set of tables, we may safely assume that there are no multivalued dependencies in the data we are given. False True TRUE ANSWER : ? YOUR ANSWER : ?
When building a database from an existing set of tables, we still need to consider normalization principles. False True TRUE ANSWER : ? YOUR ANSWER : ?
The phrase "SALE.CNumber must exist in CUSTOMER.CNumber" is a referential integrity constraint. True False TRUE ANSWER : ? YOUR ANSWER : ?
Multivalued dependencies create harmless anomalies that should be noted, but do not always need to be eliminated. False True TRUE ANSWER : ? YOUR ANSWER : ?
Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems? The multivalue, multicolumn problem The inconsistent values problem The missing values problem The general-purpose remarks column problem TRUE ANSWER : ? YOUR ANSWER : ?
For a number of reasons, normalizations is not often an advantage for a(n) ________ database. read-only either a read-only or an updateable updateable None of these TRUE ANSWER : ? YOUR ANSWER : ?
One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data. False True TRUE ANSWER : ? YOUR ANSWER : ?
Each answer below shows example data from a table. Which answer is an example of the multivalue, multicolumn problem? Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column. Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row. Three rows have the values Brown, NULL, and Blue in the same column. One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column. TRUE ANSWER : ? YOUR ANSWER : ?
When you are given a set of tables and asked to create a database to store their data, the first step is to create the new database. False True TRUE ANSWER : ? YOUR ANSWER : ?