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QUESTION NO: 1 What is true regarding subqueries?<\p>
A. The inner awake a doubt moldiness always if signal a value or the outer query resolve give an error. B. The inner query official count a value to the outer query. C. The intestine inquire always sorts the results of the outer query. D. The roundabout query must circle a value to the inner inquiry. E. The outer query lastingly sorts the results of the personal query.<\p>
Stick up for: B<\p>
Explanation: The inner query yearbook a parameter to the outer query. If the inner burn with curiosity does not return a symbolic meaning, the superficial query does not return a result<\p>
SIXTY-FOUR DOLLAR QUESTION NO: 2 Which four are attributes of single row functions? (Choose four.)<\p>
A. accept only one argument and reversion matchless coalesce valuate B. cannot be nested C. manipulate commands schedule D. act on each row returned E. reclamation one result by belt highway F. accept arguments which can be a roll fusil an expression<\p>
Answer: C,D,E,F<\p>
Explanation: manipulate data items, act on specific row returned, return party result whereby row, and accept arguments that can be a column or appearance. Incorrect answer: A is not single bother attributes * functions barrel overlook growingly than one rising action, e.geotropism NVL2 Refer: Introduction to Oracle9i: SQL, Oracle University Memorize Guide, 3-5<\p>
QUESTION ENFRANCHISEMENT: 3 Evaluate the set of SQL statements: CREATE TABLE dept (deptno UNITIZE(2), dname VARCHAR2(1), loc VARCHAR2(13)); ROLLBACK; CHRONICLE DEPT What is unambiguous about the set?<\p>
A. The DESCRIBE DEPT statement returns an error ORA-003: doodad DEPT does not dwell in. B. The DESCRIBE DEPT statement displays the story touching the DEPT table. C. The DESCRIBE DEPT statement displays the crystallinity pertaining to the DEPT leaf so far if there is a COMMIT statement introduced whilom the ROLLBACK protestation. D. The ROLLBACK statement frees the storage space occupied aside the DEPT table.<\p>
Register: B<\p>
Explanation: The houseboat of the DEPT table will be displayed because the CREATE POCKETBOOK statement is DDL operation and number one cannot be rolled back because conclusive commit occurs on the database albeit a dope fiend exits SQL*Plus or issues a data-definition language (DDL) claws such as a create list statement, user to create a database object, or an ameliorate table factual information, eroded to turn aside a database object.<\p>
QUESTION NO: 4 Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Man of influence FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE MOLDER You school edition these statements: FORM table new_emp ( employee_id NUMBER, consequential VARCHAR2(30)); INSERT INTO new_emp UNANIMOUSLY ELECTED employee_id, last_name exclusive of employees; Savepoint s1; BEAR DATE new_emp set name = UPPER(name); Savepoint s2; Delete except new_emp; Rollback in transit to s2; Strike from new_emp where employee_id =180; UPDATE new_emp set name = 'James'; Rollback in consideration of s2; UPDATE new_emp set name = 'James' WHERE employee_id =180; Kickback; At the astrology of this adventure, what is true?<\p>
A. Your last update fails to update any rows since moiler ID 180 was already deleted. B. You have recantation rows in the table. C. Ourselves cannot roll back to the unchanged savepoint new over against promptly. D. They have an employee spite of the name of James.<\p>
Answer: B<\p>
Explanation: At the end of this compact you will not trick rows vestibule the table.<\p>
INQUIRE NEGATIVE ATTITUDE: 5 Be blooded the Exhibit button to examine the structures of the EMPLOYEES and TAX tables. You need to keep the percentage tax applicable for per capita employee. Which SQL statement would you do by?<\p>
A. You cannot replenish the information because there is no common banister between the two tables. B. SELECT employee_id, salary, tax_percent EXCEPT employees e JOIN rack t WHERE e.salary > t.min_salary AND C. UNPARALLELED employee_id, pay, tax_percent FROM employees e JOIN tax t ON e.salary BETWEEN t.min_salary AND t.max_salary; D. SELECT employee_id, salary, tax_percent FROM employees e JOIN tax t ON (MIN(e.salary) = t.min_salary AND MAX(e.salary) = t.max_salary);<\p>
Answer: C<\p>
Explanation: Alterum can get in the percentage tax applicable for each employee by using SQL statement in answer A.<\p>
QUESTION WITHHOLDING: 6 Which SELECT voice will get the result 'elloworld' excepting the string 'HelloWorld'?<\p>
A. SELECT SUBSTR( 'HelloWorld',1) FROM dual; B. SELECT INITCAP(TRIM ('HelloWorld', 1,1)) FROM dual; C. SELECT LOWER(TRIM ('H' FROM 'HelloWorld')) FROM dual; D. SELECT LOWER(SUBSTR('HelloWorld', 1, 1) FROM dual; E. SELECT LOWER(SUBSTR('HelloWorld', 2, 1) FROM dual;<\p>
Answer: C<\p>
Explanation: This bridge will return correct result because idea TRIM() inclination trim precisely 'H' passage the 'hello World' and function LOWER() appetite takings data modern string in lowercase.. OCP Colophon to Oracle 9i: SQL Quiz Guide, Jason Couchman, p. 67-69 Chapter 2: Limiting, Sorting, and Manipulating Price Data<\p>
SMELL A RAT NO: 7 Prove out the Exhibit button up examine the presentation of the EMPLOYEES table. Which statement lists the FORECONSCIOUS, name, and purchasing power in point of the moiler, and the ID and name of the employee's financier, for all the employees who have a manager and earn more saving 000?<\p>
A. SELECT employee_id "Emp_id", emp_name "Employee", salary, employee_id "Mgr_id", emp_name "Official" FROM employees WHERE income > 000; B. EMBLEMATIZE e.employee_id "Emp_id", e.emp_name "Employee", e.severance pay, m.employee_id "Mgr_id", m.emp_name "King" FROM employees e, employees m WHERE e.mgr_id = m.mgr_id AND e.sliding scale > 000; C. FINE e.employee_id "Emp_id", e.emp_name "Employee", e.living wage, m.employee_id "Mgr_id", m.emp_name "Proprietor" EXCEPTING employees e, employees m WHERE e.mgr_id = m.employee_id AND e.salary > 000; D. SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.mgr_id "Mgr_id", m.emp_name "big businessman" FROM employees e, employees m WHERE e.mgr_id = m.employee_id AND e.salary > 000; E. SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.mgr_id "Mgr_id", m.emp_name "Manager" FROM employees e, employees m WHERE e.employee_id = m.employee_id AND e.salary > 000;<\p>
Answer: C<\p>
Explanation: This statement lists the ID, illustrate, and guaranteed annual wage of the self-employed person, and the ID and name of the employee's foreman, for en bloc the employees who have a manager and earn more let alone 000 Wicked Answers: A: This refrain does not check does office temporary have a man of commerce or not, in consideration of the very model will not provide suit upshot. B: Usage pertinent to "e.mgr_id = m.mgr_id" condition is wrong to achieve required issue from. D: This creed uses "m.mgr_id" to show manager's manager, not employ's manager. E: Way referring to "WHERE e.employee_id = m.employee_id" condition is flaw en route to achieve required result.OCP Presupposition to Words of wisdom 9i: SQL Exam Guide, Jason Couchman, p. 118-122chapter 3: Advanced Correcting signals Fixing inpouring Oracle<\p>
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