Read-only databases are ________ updated. seldom always commonly never TRUE ANSWER : ? YOUR ANSWER : ?
Each answer below shows example data from a table. Which answer is an example of the missing values problem? One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column. 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. TRUE ANSWER : ? YOUR ANSWER : ?
One common design problem when designing a database from existing data is the use of a general-purpose remarks column in the received data. False True TRUE ANSWER : ? YOUR ANSWER : ?
Creating a read-only database is a task that is ________ assigned to beginning database professionals. never seldom commonly always TRUE ANSWER : ? YOUR ANSWER : ?
The phrase "SALE.CNumber must exist in CUSTOMER.CNumber" is a referential integrity constraint. True False TRUE ANSWER : ? YOUR ANSWER : ?
Eliminating modification anomalies is a(n) ________ of normalization. advantage either an advantage or disadvantage neither an advantage nor disadvantage disadvantage TRUE ANSWER : ? YOUR ANSWER : ?
Needing to using more complicated SQL in database applications is a(n) ________ of normalization. neither an advantage nor disadvantage advantage either an advantage or disadvantage disadvantage TRUE ANSWER : ? YOUR ANSWER : ?
Each answer below shows example data from a table. Which answer is an example of the general-purpose remarks column problem? Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row. One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column. Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column. Three rows have the values Brown, NULL, and Blue in the same column. TRUE ANSWER : ? YOUR ANSWER : ?
Normalization ________ data duplication. increases reduces maximizes eliminates TRUE ANSWER : ? YOUR ANSWER : ?
Multivalued dependencies should ________ be eliminated. always commonly never seldom TRUE ANSWER : ? YOUR ANSWER : ?