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

试卷相关题目

• 1Which 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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• 2Given 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、

  A.SELECT employees.name, sales.revenue FROM employees INNER JOIN sales ON employees.id =sales.emp_id

  B.SELECT employees.name, sales.revenue FROM employees INNER JOIN sales ON sales.emp_id =employees.id

  C.SELECT employees.name, sales.revenue FROM sales LEFT OUTER JOIN employees ONemployees.id = sales.emp_id

  D.SELECT employees.name, sales.revenue FROM sales RIGHT OUTER JOIN employees ONemployees.id = sales.emp_id

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• 3If 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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• 4An 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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• 5Which 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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• 6Which 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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• 7User 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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• 8Which 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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• 9If the following result set is desired:  LASTNAME    FIRSTNAME   SALARY      JOB --------    ---------   ------      --- HAAS        CHRISTINE   152750.00   PRES KWAN        SALLY       98250.00    MANAGER PULASKI     EVA         96170.00    MANAGER THOMPSON    MICHAEL     94250.00    MANAGER HENDERSON   EILEEN      89750.00    MANAGER Which SQL statement must be executed、

  A.SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 FETCH FIRST 5 ROWSONLY

  B.SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 DESC FETCH FIRST 5ROWS ONLY

  C.SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 FETCH FIRST 5 ROWS

  D.SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 DESC FETCH FIRST 5ROWS

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• 10Which statement about INSERT operations is true、

  A.The INSERT statement is used to insert rows into a table, view, or table function.

  B.Inserted values must satisfy the conditions of any check constraints defined on the table.

  C.If an INSERT statement omits any column from the inserted row that is defined as NULL or NOT NULL WITH DEFAULT, the statement will fail.

  D.If the underlying table of a view being referenced by an INSERT statement has one or more unique indexes, each row inserted does not have to conform to the constraints imposed by those indexes.

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