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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. EMPLOYEES and DEPARTMENTS data:

On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID
managers and refers to the EMPLOYEE_ID.
On the DEPARTMENTS table DEPARTMENT_ID is the primary key.
Evaluate this UPDATE statement.
UPDATE employees
SET mgr_id =
(SELECT mgr_id
FROM employees
WHERE dept_id=
(SELECT department_id
FROM departments
WHERE department_name = 'Administration')),
Salary = (SELECT salary
FROM employees
WHERE emp_name = 'Smith')
WHERE job_id = 'IT_ADMIN';
What happens when the statement is executed?

A) The statement executes successfully, leaves the manager ID as the existing value, and changes the salary to 4000 for the employees with ID 103 and 105.
B) The statement executes successfully, changes the manager ID to NULL, and changes the salary to 3000 for the employees with ID 103 and 105.
C) The statement executes successfully, changes the manager ID to NULL, and changes the salary to 4000 for the employees with ID 103 and 105.
D) The statement fails because there is no 'Administration' department in the DEPARTMENTS table.
E) The statement fails because there is more than one row matching the IT_ADMIN job ID in the EMPLOYEES table.
F) The statement fails because there is more than one row matching the employee name Smith.

2. Which three SELECT statements displays 2000 in the format "$2,000.00"? (Choose three)

A) SELECT TO CHAR (2000,'$#,###.##') FROM dual;
B) SELECT TO CHAR (2000, '$9,999.00') FROM dual;
C) SELECT TO CHAR (2000, '$9,999.99') FROM dual;
D) SELECT TO CHAR (2000, '$0,000.00') FROM dual;
E) SELECT TO CHAR (2000, '$N,NNN.NN') FROM dual;
F) SELECT TO CHAR (2000, '$2,000.00') FROM dual;

3. Examine the structure of the EMPLOYEES table:

You need to create an index called NAME_IDX on the first name and last name fields of the EMPLOYEES table. Which SQL statement would you use to perform this task?

A) CREATE INDEX NAME_IDX
FOR employees(first_name, last_name);
B) CREATE INDEX NAME_IDX
ON employees (first_name AND last_name);
C) CREATE INDEX NAME_IDX
ON employees(first_name, last_name);
D) CREATE INDEX NAME_IDX (first_name, last_name);
E) CREATE INDEX NAME_IDX (first_name AND last_name);
F) CREATE INDEX NAME_IDX
ON (first_name, last_name);

4. Which is an iSQL*Plus command?

A) DESCRIBE
B) RENAME
C) DELETE
D) INSERT
E) UPDATE
F) SELECT

5. Which three are DATETIME data types that can be used when specifying column definitions? (Choose three.)

A) TIMESTAMP WITH DATABASE TIMEZONE
B) INTERVAL YEAR TO MONTH
C) TIMESTAMP
D) INTERVAL MONTH TO DAY
E) INTERVAL DAY TO SECOND

Solutions: