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9781111969752_TB_ch14

9781111969752_TB_ch14 - Chapter 14 Using Relational...

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Chapter 14: Using Relational Databases TRUE/FALSE 1. Database software recognizes the distinction between text and numeric data. ANS: T PTS: 1 REF: 559 2. In some database software packages, such as Microsoft Access, you indicate a primary key simply by selecting a column name and clicking a button that is labeled with a key icon. ANS: T PTS: 1 REF: 561 3. Some database designers insert an exclamation point after the key instead of underlining it. ANS: F PTS: 1 REF: 563 4. Entering data into an existing table is not difficult, but it requires a good deal of time and accurate typing. ANS: T PTS: 1 REF: 564 5. In many database systems, some “deleted” records are not physically removed, but they are just marked as deleted so that they will not be used to process active records. ANS: T PTS: 1 REF: 564 6. Structured Query Language is a commonly used language for accessing data in database tables. ANS: T PTS: 1 REF: 565 7. A common reason you create a one-to-one relationship is security. ANS: T PTS: 1 REF: 573 8. Normalization involves altering a table so that it satisfies one or more of four normal forms, or sets of rules for constructing a well-designed database. ANS: F PTS: 1 REF: 577 9. 3NF requires that a table be in 2NF and have transitive dependencies. ANS: F PTS: 1 REF: 582 10. Database software provides the means to ensure that data integrity is enforced. ANS: T PTS: 1 REF: 585 MULTIPLE CHOICE 1. In a database, the files often are called ____ because you can arrange their contents in rows and columns.
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a. sheets c. forms b. pages d. tables ANS: D PTS: 1 REF: 556 2. A key that is constructed from multiple columns is called a compound key or ____ key. a. composite c. joined b. combined d. joint ANS: A PTS: 1 REF: 557 3. When a field in a database contains a null value, it means that ____. 4. If an employee record contains both a company-assigned employee ID and a Social Security number, then both columns are ____ keys. 5. After you choose a primary key from among candidate keys, the remaining candidate keys become ____ keys. 6. Depending on the software you use, you might create a query by filling in blanks in a process called ____. a. query by example c. query by demonstration b. query by reference d. query by comparison ANS: A PTS: 1 REF: 565
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  • Fall '15
  • pts, REF, Database Software

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