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  Filed under NCR Teradata
  Aug 3

  NCR Teradata认证nr0-013考试题库介绍

  考试代号: nr0-013
  问题数量:106 Q&As
  
  更新时间: 2009-09-03
  注册地点: Prometric/Pearson VUE
  题库全称:Teradata Sql v2r5 Exam

  免费nr0-013题库Demo赏析

  　
  　
  Exam : NCR Teradata NR0-013
  Title : Teradata Sql v2r5 Exam

  1. When is a table alias required?
  A. to enhance join processing
  B. when joining a table to itself
  C. when processing subqueries
  D. when joining more than two tables
  Answer: B

  2. Which information does HELP TABLE <tablename> provide about the specified table?
  A. column name, data type, and comment
  B. column name, index, data type, and comment
  C. column name, table id, data type, and comment
  D. column name, constraint, data type, and comment
  Answer: A

  3. Where can the join condition for an inner join be specified? (Choose two.)
  A. the ON clause
  B. the ANY clause
  C. the FROM clause
  D. the WHERE clause
  Answer: AD

  4. Consider this request in Teradata mode:
  DELETE t1;
  Which request performs equivalently in ANSI mode?
  A. DROP TABLE t1;
  B. DELETE FROM t1;
  C. DELETE FROM t1 ALL;
  D. DELETE FROM t1; COMMIT;
  Answer: D

  5. Consider the following:
  What could the result set contain? (Choose three.)
  A. all employees
  B. jobs without employees
  C. departments with no employees
  D. employees without departments
  E. employees with invalid departments
  Answer: ADE

  6. What are three characteristics of views? (Choose three.)
  A. Views can contain a WHERE clause.
  B. Views cannot be used to UPDATE a table.
  C. Views must change if columns are added to a table.
  D. Views are not affected if columns are added to a table.
  E. Views provide an additional level of security or authorization.
  Answer: ADE

  7. Which result do you get from the SELECT SESSION statement ?
  A. the SQLFLAG value for the user
  B. the session number for the user
  C. the session transaction mode for the user
  D. the number of sessions running for the user
  Answer: B

  8. What is the join type in the following query?
  A. self join
  B. cross join
  C. nested join
  D. Cartesian join
  Answer: A

  9. Which command will display the account you are currently using?
  A. HELP USER;
  B. HELP SESSION;
  C. HELP ACCOUNT;
  D. EXPLAIN ACCOUNT;
  E. SELECT ‘ACCOUNT’;
  Answer: B

  10. What does the EXPLAIN output provide to assist the user in query analysis? (Choose two.)
  A. which steps may be processed in parallel
  B. what statistics should be collected on a column
  C. accurate time measurements for query processing
  D. details of which indexes, if any, will be used to process the query
  E. recommendations to improve the query based on timing and sizing
  Answer: AD

  11. What two types of tables are available when users need to create a small temporary table but only have spool space allocated to them? (Choose two.)
  A. Volatile
  B. Derived
  C. Permanent
  D. Global Temporary
  Answer: AB

  12. The FULL OUTER JOIN command is designed to produce which type of results?
  A. all unmatched data from both tables, with the matched data eliminated
  B. all matched data from both tables, combined with all unmatched data from both tables
  C. all rows from the table listed before the JOIN command and the unmatched rows from the other table
  D. all matched data from both tables, and the unmatched rows from the second table listed in the JOIN clause
  Answer: B

  13. Click the Exhibit button.
  Given the table and the query shown in the exhibit, what is the result set?
  A. Smith
  B. Miller
  C. NULL
  D. Fisher
  E. Adams
  Answer: D

  14. What is the result of SELECT CAST(’bb12345′ AS CHAR(3)) in Teradata mode? (Note: b = blank)
  A. 1
  B. ‘bb1′
  C. 123
  D. 345
  E. ‘123′
  F. ‘345′
  Answer: B

  15. The choice of ANSI vs. Teradata mode affects which three items? (Choose three.)
  A. data conversions
  B. rounding behavior
  C. case sensitivity defaults
  D. transaction protocol behavior
  Answer: ACD

  16. Which two are correct uses of table aliasing to avoid Cartesian product joins? (Choose two.)
  A. SEL * FROM table_a A1, table_a
  　WHERE A1.acct1 = table_a.acct2
  B. SEL * FROM table_a A1, table_a A2
  　WHERE A1.acct1 = A2.acct2
  C. SEL * FROM table_a A1, table_a A2
  　WHERE A1.acct1 = table_a.acct2
  D. SEL A1.c1, table_a.c2 FROM table_a A1, table_a A2
  　WHERE A1.acct1 = A2.acct2
  Answer: AB

  17. Click the Exhibit button.
  Given the two tables and the query shown in the exhibit, what is the result set?
  A. 5, NULL
  B. 2, NULL
  C. 2, 2300
  D. 3, NULL
  E. 2, 20000
  Answer: B

  18. Consider the following query:
  Which is true?
  A. It returns information about employees who have no department number.
  B. It returns information about departments that have no employees assigned to them.
  C. The ON clause can be replaced with a WHERE clause to produce the same results.
  D. It returns an output row for each successful match between employee and department.
  Answer: D

  19. Given the query
  SELECT AVG(column1) FROM t1;
  where t1 is an empty table, what is the result?
  A. 0
  B. Null
  C. Error
  D. No record found
  Answer: B

  20. Which two statements about the ACCOUNT function are true? (Choose two.)
  A. It has no arguments.
  B. It cannot be used in a macro.
  C. Value is provided by the parser.
  D. It must be coded between quotes.
  Answer: AC

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  NCR Teradata nr0-013学习指南

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