Ch2-DB - Ch2-DB True/False Indicate whether the statement...

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Ch2-DB True/False Indicate whether the statement is true or false. ____ 1. A relational database handles entities, attributes, and relationships by storing each entity in its own table. ____ 2. The attributes of an entity become the fields or columns in a table. ____ 3. Each column in a table should have a unique name, and entries in each column should all “match” this column name. ____ 4. In a relation, the order of the columns is important. ____ 5. In a relation, the order of rows is important. ____ 6. An unnormalized relation is a table that has more than one row. ____ 7. A column whose value uniquely identifies a given row in the table is the secondary key. ____ 8. A query is a question represented in a way that the DBMS can recognize and process. ____ 9. QBE is a visual approach to writing queries. ____ 10. The comparison operators are +, *, %, and /. ____ 11. In an AND criterion, the overall criterion is true if either of the individual criteria is true. ____ 12. The concept of grouping means that statistics will be calculated for individual records. Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 13. A relation is a(n) ____. a. attribute c. field b. column d. table ____ 14. Based on the statement below, which of the following is the primary key? Rep (RepNum
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This note was uploaded on 10/20/2008 for the course IST 331 taught by Professor Sikder during the Spring '08 term at Cleveland State.

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Ch2-DB - Ch2-DB True/False Indicate whether the statement...

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