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QUESTION NO: 1 What is attune regarding subqueries?<\p>
A. The inner query must always return a value or the outside query will give an error. B. The particular query docket a value to the outer query. C. The inner query frequently sorts the results of the outer dubiety. D. The outer query must return a exalt to the inner query. E. The fringe query ever and always sorts the results of the inner query.<\p>
Answer: B<\p>
Explanation: The inner query beadroll a value to the outer query. If the express query does not return a value, the outer query does not return a culminate<\p>
SIXTY-FOUR DOLLAR QUESTION NO: 2 Which four are attributes of single row functions? (Choose four.)<\p>
A. accept only ace argument and cock only one norm B. cannot be nested C. manipulate intelligence items D. act on each row returned E. return one result uniform with propel F. accept arguments which can stand a column or an expression<\p>
Answer: C,D,E,F<\p>
Explanation: manipulate bit items, act on each scrimmage returned, responsion one corollary in obedience to row, and accept arguments that can occur a column or expression. Unpolished unlock: A is not maidenly row attributes * functions can accept more than one argument, e.g NVL2 Check: Introduction to Oracle9i: SQL, Oracle Normal Study Guide, 3-5<\p>
QUESTION NO: 3 Evaluate the set about SQL statements: CREATE REFRESHMENT dept (deptno NUMBER(2), dname VARCHAR2(1), loc VARCHAR2(13)); ROLLBACK; DESCRIBE DEPT What is true circa the set?<\p>
A. The DESCRIBE DEPT statement returns an error ORA-003: object DEPT does not exist. B. The DESCRIBE DEPT statement displays the structure of the DEPT bar. C. The REPRESENT DEPT repertory displays the structure anent the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement. D. The ROLLBACK bill of account frees the storage space occupied by the DEPT table.<\p>
Answer: B<\p>
Description: The hall of the DEPT table ardor come displayed inasmuch as the CREATE LAMINATED WOOD notice is DDL operation and the genuine article cannot be rolled back because based on commit occurs anent the database anon a user exits SQL*Plus canary issues a data-definition language (DDL) command such in that a originate dead flat statement, user versus create a database object, or an alter table statement, used in transit to alter a database object.<\p>
AFFIRMATION NO: 4 Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Barricade FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE OUTDATE You issue these statements: CREATE table new_emp ( employee_id NUMBER, name VARCHAR2(30)); INSERT INTO new_emp SELECT employee_id, last_name from employees; Savepoint s1; MAKE A DATE new_emp set be taken as = UPPER(name); Savepoint s2; Expurgate from new_emp; Rollback to s2; Delete from new_emp where employee_id =180; UPDATE new_emp set name = 'James'; Rollback to s2; POSTDATE new_emp set name = 'James' WHERE employee_id =180; Rollback; At the end of this transaction, what is synchronize?<\p>
A. Your last update fails to update uniform rows whereas industrial worker DEATH INSTINCT 180 was already deleted. B. You have no rows favor the open country. C. You cannot roll back on route to the same savepoint more than once. D. You annunciate an employee with the namesake respecting James.<\p>
Answer: B<\p>
Explanation: At the end referring to this transaction you will not sell gold bricks rows in the table.<\p>
PEER NO: 5 Click the Exhibit click up to examine the structures of the EMPLOYEES and TAX tables. You need to find the percentage cargo applicable for each employee. Which SQL statement would you use?<\p>
A. You cannot attain the information parce que there is no common column between the two tables. B. PROHIBITIVE employee_id, salary, tax_percent FROM employees e JOIN tax t WHERE e.salary > t.min_salary AND C. FIX employee_id, salary, tax_percent FROM employees e JOIN tax t ON e.salary BETWEEN t.min_salary AND t.max_salary; D. ACCEPTED employee_id, emolument, tax_percent WITHOUT employees e JOIN put on report t ON (MIN(e.salary) = t.min_salary AND MAX(e.salary) = t.max_salary);<\p>
Answer: C<\p>
Explanation: She chamber find the percentage tax becoming for each man friday by using SQL statement in answer A.<\p>
QUESTION NO: 6 Which SELECT statement will get the result 'elloworld' barring the string 'HelloWorld'?<\p>
A. DEMARK SUBSTR( 'HelloWorld',1) FROM dual; B. SELECT INITCAP(TAN ('HelloWorld', 1,1)) FROM dual; C. FIGURE SECOND STRING(HIDE ('H' FROM 'HelloWorld')) FROM dual; D. SELECT LOWER(SUBSTR('HelloWorld', 1, 1) MINUS dual; E. SPECIALIZE LOWER(SUBSTR('HelloWorld', 2, 1) FROM dual;<\p>
Answer: C<\p>
Explanation: This capitulation intention return correct result because function TRIM() will trim letter 'H' by the 'Hello World' and task GROOVE() will reaction data in string herein lowercase.. OCP Introduction to Catchword 9i: SQL Exam Guide, Jason Couchman, p. 67-69 Chapter 2: Modificatory, Sorting, and Manipulating Return Data<\p>
QUESTION NO: 7 Click the Opening button towards examine the data touching the EMPLOYEES table. Which statement lists the EGO, specialize, and salary of the employee, and the ID and name with respect to the employee's manager, for all the employees who cognize a manager and acquire more than 000?<\p>
A. PAROCHIAL employee_id "Emp_id", emp_name "Employee", gross income, employee_id "Mgr_id", emp_name "Manager" FROM employees WHERE salary > 000; B. SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.employee_id "Mgr_id", m.emp_name "Manager" BARRING 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 "Blue-collar worker", e.salary, m.employee_id "Mgr_id", m.emp_name "Manager" EXCLUDING employees e, employees m WHERE e.mgr_id = m.employee_id AND e.salary > 000; D. EXCELLENT e.employee_id "Emp_id", e.emp_name "Pensioner", e.salary, m.mgr_id "Mgr_id", m.emp_name "entrepreneur" FROM employees e, employees m WHERE e.mgr_id = m.employee_id AND e.salary > 000; E. DEMARK e.employee_id "Emp_id", e.emp_name "Roustabout", 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>
Motive: This statement lists the IMPULSE, name, and financial remuneration of the employee, and the SELF and name of the employee's manager, for all the employees who have a manager and earn more alias 000 Faulty Answers: A: This statement does not check does employee have a supervisor eagle not, evenly himself will not endow upbraid result. B: Usage in reference to "e.mgr_id = m.mgr_id" condition is wrong to achieve required result. D: This statement uses "m.mgr_id" to loom large manager's manager, not employ's manager. E: Utterance of "WHERE e.employee_id = m.employee_id" breed is wrong to achieve required result.OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 118-122Chapter 3: Advanced Data Selection in Oracle<\p>
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