A table named SALES contains a record for every sales transaction a company processes. A user wishes to see the number of transactions that are made by each salesman. Which SQL statement will produce the desired results、

试卷相关题目

• 1Which tool allows users to connect to a DB2 database using a wizard、

  A.Control Center

  B.IBM Data Studio

  C.Universal Connection Expert

  D.DB2 Connection Pool Manager

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• 2Which platform supports DB2 pureScale environments、

  A.AIX

  B.iOS

  C.z/OS

  D.Windows

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• 3Which DB2 product is NOT suitable for very large data warehouse applications、

  A.DB2 for i

  B.DB2 for AIX

  C.DB2 for z/OS

  D.DB2 for Linux

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• 4Which product replaced the Control Center used in versions prior to DB2 v10、

  A.IBM Data Studio

  B.IBM Administrator

  C.IBM Data Manager

  D.IBM Command Center

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• 5What type of large object (LOB) is used to store LOB data together with the formatted rows on data pages, instead of in a separate LOB storage object、

  A.inline

  B.binary

  C.internal

  D.partitioned

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• 6Which statement about roll back operations is correct、

  A.When a ROLLBACK statement is executed, all locks held by the terminating transaction are released.

  B.When a ROLLBACK TO SAVEPOINT statement is executed, all locks acquired up to the savepoint are released.

  C.When a ROLLBACK TO SAVEPOINT statement is executed, all locks acquired after the savepoint are release

  D.D. When a ROLLBACK statement is executed, all locks acquired for open cursors that were declared WITH HOLD, are held.

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• 7When a COMMIT statement is executed, what happens、

  A.All locks held on the database are automatically released.

  B.Data stored in global temporary tables is automatically deleted.

  C.Open cursors defined WITH HOLD are closed, but their data is retaine

  D.D. The current transaction is terminated and a new transaction boundary is started.

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• 8Which SQL statement would be used to retrieve only salaries that are greater than $100,000.00 from a table named EMPLOYEE、

  A.SELECT * FROM employee WHERE salary < 100000

  B.SELECT salary FROM employee WHERE salary > 100000

  C.SELECT salary FROM employee WHERE salary > 100,000.00

  D.SELECT * FROM employee WHERE salary GREATER THAN 100000

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• 9Which SQL statement should be used to retrieve the minimum and maximum salaries (SALARY) for each job code (JOB), sorted by job code, from a table named EMPLOYEE、

  A.SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY job ORDER BY job;

  B.SELECT job, MIN(salary), MAX(salary) FROM employee ORDER BY job;

  C.SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY SALARY ORDER BY job;

  D.SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY MIN(salary), MAX(salary)ORDER BY job;

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• 10If a table named MY_TAB contains 100 rows and the following statement is executed:  UPDATE  (SELECT * FROM my_tab   ORDER BY col1 DESC   FETCH FIRST 10 ROWS ONLY) AS temp   SET col3 = 99; How many rows will be updated、

  A.0

  B.1

  C.10

  D.99

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