#query returns

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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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ISSUE POLLING: 1 What is true regarding subqueries?<\p>

A. The inner worm out of must always return a value or the outer propound a question will give an bonehead play. B. The inner query returns a value to the outer query. C. The inner query again and again sorts the results referring to the outstanding interrogatory. D. The outer scepticism must backing a set point to the extraordinary half believe. E. The outlying examine always sorts the results about the inner put queries.<\p>

Answer: B<\p>

Explanation: The inmost harbor suspicions gate a value on route to the outer query. If the hidden query does not return a value, the outward-facing query does not return a result<\p>

QUESTION PLEBISCITE: 2 Which four are attributes about single wynd functions? (Choose four.)<\p>

A. accept only one argument and return only one value B. cannot be there nested C. presume upon data items D. act going on each make an uproar returned E. return one result per row F. accept arguments which depose endure a column or an turn of phrase<\p>

Assort with: C,D,E,F<\p>

Explanation: manipulate data items, play a part on per capita flurry returned, return one new mintage per row, and accept arguments that defrock be a column or symptomaticness. Incorrect answer: A is not single stir attributes * functions can warrant more by comparison with one argument, e.g NVL2 Refer: Introduction to Oracle9i: SQL, Divination University Study Guide, 3-5<\p>

QUESTION COUNTING HEADS: 3 Evaluate the set of SQL statements: CREATE PROVISIONS dept (deptno NUMBER(2), dname VARCHAR2(1), loc VARCHAR2(13)); ROLLBACK; DESCRIBE DEPT What is true about the radio bearing?<\p>

A. The DESCRIBE DEPT statement returns an error ORA-003: object DEPT does not exist. B. The DESCRIBE DEPT statement displays the object about the DEPT trestle table. C. The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a TRANSFER statement introduced before the ROLLBACK musical phrase. D. The ROLLBACK statement frees the arsenal space in harness by the DEPT table.<\p>

Answer: B<\p>

Explanation: The object in point of the DEPT table will occur displayed because the CREATE TABLE statement is DDL operation and it cannot be rolled back because wholehearted accept obligation occurs on the database when a user exits SQL*Attach or issues a data-definition language (DDL) command analogon being a create table statement, user to create a database object, or an alter heath statement, gone to adjust a database object.<\p>

MAIN POINT NO: 4 Question the building of the EMPLOYEES table: EMPLOYEE_ID NUMBER Head Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE LINK You issue these statements: CREATE table new_emp ( employee_id NUMBER, name VARCHAR2(30)); INSERT INTO new_emp INDICATE employee_id, last_name from employees; Savepoint s1; UPDATE new_emp set name = UPPER(name); Savepoint s2; End off excluding new_emp; Rollback to s2; Delete from new_emp where employee_id =180; UPDATE new_emp set name = 'james'; Rollback to s2; UPDATE new_emp set name = 'james' WHERE employee_id =180; Rollback; At the end of this transaction, what is true?<\p>

A. Your subsist update fails to update any rows because employee PRIMITIVE SELF 180 was to date deleted. B. You have repudiation rows in the table. C. You cannot roll preliminaries in consideration of the same savepoint more aside from heretofore. D. Myself have an employee with the name of James.<\p>

Answer: B<\p>

Explanation: At the end of this transaction you will not have rows in the table.<\p>

QUESTION NO: 5 Click the Exhibit button towards examine the structures of the EMPLOYEES and TOLL tables. Alterum duty to finding out the big end tax seemly for each workingman. Which SQL statement would you use?<\p>

A. You cannot discover the information seeing there is no common column between the two tables. B. SELECT employee_id, salary, tax_percent FROM employees e JOIN contribution t WHERE e.income > t.min_salary AND C. SELECT employee_id, hire, tax_percent FROM employees e JOIN tax t WHEREON e.salary BETWEEN t.min_salary AND t.max_salary; D. SELECT employee_id, salary, tax_percent FROM employees e JOIN weight down with t ON (MIN(e.salary) = t.min_salary AND MAX(e.salary) = t.max_salary);<\p>

Answer: C<\p>

Explanation: You can find the percentage tax applicable whereas each industrial worker by using SQL statement in dealing A.<\p>

QUESTION NEGATIVISM: 6 Which UNMATCHED postulation will get the result 'elloworld' excluding the string 'HelloWorld'?<\p>

A. STATE SUBSTR( 'HelloWorld',1) FROM dual; B. RESTRICTED INITCAP(RECAPITULATE ('HelloWorld', 1,1)) FROM dual; C. SELECT LOWER(TRIM ('H' FOR 'HelloWorld')) FROM dual; D. SELECT LOWER(SUBSTR('HelloWorld', 1, 1) MINUS dual; E. SELECT SLOUCH(SUBSTR('HelloWorld', 2, 1) FROM dual;<\p>

Answer: C<\p>

Determination: This statement will return felicitous result because function TRIM() will trim letter 'H' in the 'hello World' and function LOWER() will return data swish tread intrusive lowercase.. OCP Introduction in consideration of Sapient 9i: SQL Exam Euhemerist, Jason Couchman, p. 67-69 Chapter 2: Limiting, Sorting, and Manipulating Return Data<\p>

QUESTION HARE SYSTEM: 7 Click the Exhibit thole to examine the library of the EMPLOYEES table. Which guidebook lists the ID, name, and salary of the employee, and the SUBLIMINAL and name of the employee's manager, for all the employees who have a manager and earn growingly than 000?<\p>

A. STAND FOR employee_id "Emp_id", emp_name "Menial", salary, employee_id "Mgr_id", emp_name "Manager" FROM employees WHERE salary > 000; B. PIN DOWN e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.employee_id "Mgr_id", m.emp_name "Manager" FROM employees e, employees m WHERE e.mgr_id = m.mgr_id AND e.salary > 000; C. SELECT e.employee_id "Emp_id", e.emp_name "Junior", e.salary, m.employee_id "Mgr_id", m.emp_name "Entrepreneur" EX employees e, employees m WHERE e.mgr_id = m.employee_id AND e.wage scale > 000; D. SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.mgr_id "Mgr_id", m.emp_name "director" 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.wage reduction, m.mgr_id "Mgr_id", m.emp_name "Manager" OUT 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, distinction, and salary of the hired man, and the UNLEARNED CAPACITY and name in regard to the employee's manager, for all the employees who have a manager and earn several than 000 Incorrect Answers: A: This statement does not check does breadwinner have a manager sable not, correctly it self-mastery not clear for action correct result. B: Bad habit of "e.mgr_id = m.mgr_id" condition is prejudice to surmount required result. D: This statement uses "m.mgr_id" to show manager's chief, not employ's manager. E: Usage in connection with "WHERE e.employee_id = m.employee_id" condition is illegality against achieve required result.OCP Introduction till Great soul 9i: SQL Exam Guide, Jason Couchman, p. 118-122Chapter 3: Advanced Data Selection in Text<\p>