Given an EMPLOYEES table and a SALES table, a user wants to produce a list of all employees and their associated revenue, even if no revenue exists. Which SQL statement will produce the desired list、

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• 1If a table named MY_TAB contains 100 rows and the following statement is executed:  DELETE FROM   (SELECT * FROM my_tab   ORDER BY col1 DESC   FETCH FIRST 5 ROWS ONLY) AS tmp; What will happen、

  A.The last 5 rows in the table will be deleted.

  B.The first 5 rows in the table will be deleted.

  C.The statement will fail because a subquery cannot be used with a DELETE statement.

  D.The statement will fail because a table name was not specified with the DELETE statement.

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• 2An SQL function designed to convert temperatures from Fahrenheit to Celsius was created as follows:  CREATE FUNCTION conv_temp(IN temp_f FLOAT)  RETURNS INTEGER  NO EXTERNAL ACTOIN  SPECIFIC convert_ftoc  RETURN INT((temp_f-32)/1.8) How can this function be used to convert average temperature (AVG_TEMP) data stored in a table called CLIMATE_INFO、

  A.CALL conv_temp(climate_info.avg_temp);

  B.CALL convert_ftoc(climate_info.avg_temp);

  C.SELECT conv_temp(avg_temp) FROM climate_info;

  D.SELECT convert_ftoc(avg_temp) FROM climate_info;

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• 3Which command is used to back out a subset of database changes that have been made within a unit of work、

  A.COMMIT

  B.ROLLBACK

  C.COMMIT TO SAVEPOINT

  D.ROLLBACK TO SAVEPOINT

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• 4When 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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• 5Which operation normally does NOT require an exclusive lock、

  A.BIND

  B.DROP

  C.GRANT

  D.SELECT

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• 6Which two operations are allowed in the body of an SQL scalar user-defined function、 (Choose two.)

  A.CALL statements.

  B.External file access.

  C.Use of a scratch pa

  D.D.COMMIT statements.

  E.SQL control statements.

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• 7Which command will delete all rows from a table without generating log records、

  A.TRIM

  B.DROP

  C.DELETE

  D.TRUNCATE

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• 8Which function can be used to obtain values from XML documents that are to be inserted into one or more tables、

  A.XMLTABLE

  B.XMLPARSE

  C.XMLEXISTS

  D.XMLATTRIBUTES

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• 9User USER1 wants to retrieve records from a table named EMPLOYEE that satisfy at least one of the following criteria:-The employee's hire date (HIREDATE) is before 1999 and the employee's salary (SALARY) is less than $40,000.00 a year. -The employee has attended universityWhich SQL statement will accomplish this、

  A.SELECT * FROM employee WHERE (hiredate < '1999-01-01' AND salary < 40000) OR (education ='University')

  B.SELECT * FROM employee WHERE (hiredate < '1999-01-01') OR (salary < 40000) OR (education ='University')

  C.SELECT * FROM employee WHERE (hiredate < '1999-01-01' OR (salary < 40000 AND (education ='University')

  D.SELECT * FROM employee WHERE (hiredate < '1999-01-01' AND salary < 40000 AND (education ='University')

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• 10Which SQL statement will retrieve the employee number (EMPNO), hire date (HIREDATE), and salary (SALARY) for each employee from a table named EMPLOYEE who was hired before 1998 and earns a salary of less than $35,000.00 per year、

  A.SELECT empno, hiredate, salary FROM employee FOR hiredate < '1998-01-01' AND salary < 35000

  B.SELECT empno, hiredate, salary FROM employee WHERE hiredate < '1998-01-01' AND salary < 35000

  C.SELECT empno, hiredate, salary FROM employee WHERE hiredate < '1998-01-01' OR salary <35000

  D.SELECT empno, hiredate, salary FROM employee FOR hiredate < '1998-01-01' OR salary < 35000

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