Which SQL statement should be used to select the minimum and maximum salaries (SALARY), by job code (JOB), from a table EMPLOYEE、

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• 1Which statement about application-period temporal tables is true、

  A.Consists of explicitly-supplied timestamps and a separate associated history table.

  B.Is based on explicitly-supplied timestamps that define the time periods during which data is valid.

  C.Is useful when one wants to keep both user-based period information and system-based historical information.

  D.Consists of a pair of columns with database-manager maintained values that indicate the period when a row is current.

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• 2Which 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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• 3If 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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• 4Which 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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• 5User 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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• 6In a trusted context environment, if a switch request is made with an authorization ID that is not allowed on a trusted connection, what state is the connection placed in、

  A.Locked

  B.Waiting

  C.Pending

  D.Unconnected

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• 7If a user has been granted SYSCTRL authority, which activities can they perform、

  A.Load operations

  B.Backup/copy table spaces

  C.Create and drop databases

  D.Monitor database performance

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• 8What is the purpose of a role、

  A.To define exactly what a specific user can do within a particular database once they have been authenticated.

  B.To group a collection of privileges together so that they can be simultaneously granted to and revoked from multiple users.

  C.To establish a credible relationship between DB2 and an external entity, such as a database administrator or a middleware server.

  D.To group a collection of users together so that they can be simultaneously granted and revoked specific authorities and privileges.

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• 9Which SQL statement will give user USER1 the ability to assign a comment to a sequence named MYSEQ、

  A.GRANT ALTER ON SEQUENCE myseq TO user1

  B.GRANT USAGE ON SEQUENCE myseq TO user1

  C.GRANT SELECT ON SEQUENCE myseq TO user1

  D.GRANT COMMENT ON SEQUENCE myseq TO user1

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• 10A column mask that is to be used for row and column access control (RCAC) was created with the DISABLE option specified. What must be done if this mask is to be used to restrict access to data storedin a table named EMPLOYEE、

  A.The column mask must be enabled; the EMPLOYEE table must be altered to activate column access control.

  B.The column mask must be enabled (column access control for the EMPLOYEE table will be activated automatically).

  C.The EMPLOYEE table must be altered to activate column access control (the column mask will be enabled automatically).

  D.The EMPLOYEE table must be altered to activate column access control; row permission must be granted to everyone who needs to use thecolumn mask.

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