Database

A parent table referenced by a child table may not be dropped. True False

a

A table can be created with or without data True False

a

A table can be created with or without data. True False

a

Both object and system privileges can be granted through a single role to a user. True False

a

By default, the foreign key restricts deletes of any parent row has a corresponding child row(s). True False

a

By default, the foreign key restricts deletes of any parent row that has a corresponding child row(s). True False

a

Consider the EMPLOYEES table. When condition in the WHERE clause limit the employees to IT Programmers with salary greater than 5000? WHERE salary>5000 AND job_id = 'IT_PROG' WHERE salary>5000 AND job_id = "IT_PROG" WHERE salary>5000 AND job_id = IT_PROG WHERE salary>5000 OR job_id = 'IT_PROG'

a

Consider the EMPLOYEES table. Which of the following SQL statements is correct to provide the sentence in the format "King has been working since 01.01.1987" with "Employee Information" alias? SELECT last_name ||'has been working since' || hire_date "Employee Information" FROM employees; SELECT last_name || 'has been working since' || hire_date Employee Information FROM employees SELECT last_name || 'has been working since' || hire_date 'Employee Information' FROM employees; SELECT last_name || "has been working since" || hire_date "Employee Information" FROM employees;

a

Consider the EMPLOYEES table. Which of the following statements count the number of employees within each department? SELECT department_id, COUNT(last_name) FROM employees GROUP BY department_id SELECT department_name, COUNT(last_name) FROM employees GROUP BY department_id SELECT department_id, department_name, COUNT(last_name) FROM employees GROUP BY department_id SELECT department_id, COUNT(last_name) FROM departments GROUP_BY last_name

a

Consider the SQL statement. Which of the following clauses does not sort the result rows by salary value in the ascending order? SELECT last_name "Employee", salary "Salary" FROM employees ORDER BY salary; ORDER BY 2; ORDER BY "Salary" ASC; ORDER BY Salary DESC;

a

Constraints always have a name. True False

a

DML statement such as INSERT, UPDATE, DELETE, and MERGE obtain a lock on the row(s), so other users cannot manipulate it. True False

a

If there are schemas named USERA and USERB, and both have an EMPLOYEES table, then if USERA wants to access the EMPLOYEES table that belongs to USERB, USERA must write select statement as follows: SELECT * FROM userb.employees; SELECT * FROM employees; SELECT * FROM usera.employees; SELECT * FROM employees.userb;

a

It is possible to combine from two tables that do not have a primary key/foreign key relationship into one result using a set operation. True False

a

Privileges, roles, and synonyms are all used to implement security in an Oracle Database. True False

a

Privileges, roles, and synonyms are all used to implement security in an Oracle database. True False

a

Queries containing set operators are called ______ . Compound queries Subqueries Inner queries Outer queries

a

Queries that return more than one row from the inner SELECT statement are called Multiple-row subqueries Multiple-column subqueries Sing-column subqueries Single-row subqueries

a

The NUMBER data types is usually the best choice for a primary key. True False

a

The TRUNCATE command removes all data permanently from a table. True False

a

The TRUNCATE command removes all data permanently from a table. True False

a

The ____ operator returns all rows that are selected by either query UNION ALL INTERSECT UNION MINUS

a

The data dictionary view USER_TAB_PRIVS_MADE lists details of table privilege grants performed by the current user. True False

a

The subquery generally executes ______ , and its output is used to complete the query condition for the main (or ____ ) query. First, outer Last, outer Last, inner First, inner

a

To obtain a last names thet student and instructors share, you use the mINUS set operator. False True

a

To obtain a list of last names that students and instructors share, you use the MINUS set operator. False True

a

To obtain a list of last names that students and instructors share, you use the MINUS set operator. False True

a

Transaction control determines when data manipulates becomes permanent in a database. True False

a

Transaction control determines when data manipulation becomes permanent in a database. True False

a

Use the _____ operator to return all rows from multiple tables and eliminate any duplicate rows. UNION MINUS UNION ALL INTERSECT

a

When using LIKE condition which symbol is used to denote one character? _ + % *

a

Which command is used to view the structure of the table LOCATIONS? DESCRIBE LOCATIONS SHOW STRUCTURE LOCATIONS SELECT * FROM LOCATIONS PRINT LOCATIONS

a

Which keyword is used to eliminate duplicate rows in the result? DISTINCT DESCRIBE HAVING GROUP BY

a

Which of the following clauses is used to limit the rows that are retrieved by the query? WHERE ORDER BY FROM GROUP BY

a

Which of the following functions joins two strings together? CONCAT TRIM INSTR SUBSTR

a

Which symbol do you use if you need to choose all the columns from the table to the result query? * + All %

a

Which symbol is used to create a substitution variable? & _ % *

a

Write SQL statement for display the department numbers with more than employees in each dept. Select deptno, count(deptno) from emp group by deptno having count(*)>3; Select deptno, count (deptno) from emp group by deptno having count(*)>2; Select deptno, count (emp) from deptno group by emp having count(*)>2; Select deptno, count(deptno) from deptno group by emp having count(*)>3;

a

Write SQL statement for display the names of the employees who are working in the company for the past 5 years: Select ename from emp where hiredate < add_month(sysdate,-60); Select ename from emp where hiredate < add_month(sysdate,+5); Select ename from emp where hiredate < add_month(sysdate,+60); Select ename from emp where hiredate < add_month(sysdate,-5);

a

Write SQL statement for increase salary of all managers by 10% Update emp set sal=sal*1.1 where empno in (select mgr from emo); Update emp set sal=sal*1.1 where empno in (select emp from emo); Update emp set sal=sal*0.1 where empno in (select emp from emo); Update emp set sal=sal*0.1 where empno in (select mgr from emo);

a

You can add and drop columns from a table using the ALTER TABLE command. True False

a

You can add to and drop columns from a table using the LATER TABLE command. True False

a

You can rename a table with the RENAME or the ALTER TABLE command. True False

a

A DISTINCT must always be user in the top-most SELECT statement of a set operation True False

b

A SELECT statement that is embedded in a clause of another SELECT statement is called Main query Subquery Inner query Outer query

b

Any user can grant or revoke ant type of system privileges to or from another user. True False

b

Any user can grant or revoke any type of system privilege to or from another user True False

b

Consider the EMPLOYEES table. Which of the following conditions in the WHERE clause will generate an error? SELECT * FROM employees WHERE last_name='&Name' SELECT job_id, SUM(salary) FROM employees GROUP BY '&Column' SELECT * FROM &Table SELECT &Column FROM employees

b

Consider the EMPLOYEES table. Which of the following conditions in the WHERE clause will generate an error? SELECT * FROM employees WHERE last_name ='&Name' SELECT job_id, SUM(salary) FROM employees GROUP BY '&Column' SELECT * FROM &Table SELECT &Column FROM employees

b

Queries that return only one row from the inner SELECT statement are called Multiple-column subqueries Single-row subqueries Single-column subqueries Multiple-row subqueries

b

The TRANCATE command and the TRUNC function can be used interchangeably. True False

b

The UNION and UNION ALL set operator have the opposite effect other. True False

b

The ____ operator compares a value to EACH value returned by a subquery NOT ANY SOME ALL

b

The ______ constraint defines a condition that each row must satisfy. PRIMARY KEY CHECK UNIQUE FOREIGN KEY

b

The ______ operator compares a value to every value returned by a subquery. NOT ALL SOME ANY

b

The condition INSERT FIRST command evaluates the WHEN condition in order. For all conditions that are true a row is inserted into the appropriate table. True False

b

The data of a temporary table is visible to all session. True False

b

What will be the result of the following SQL statement? (SYSDATE is a date of your exam) SELECT TO_CHAR(SYSDATE, 'Day') FROM Dual; 31.05.2013 Friday 31 31-05.2013

b

What will be the result of the following query? SELECT ROUND (63.548, -1) FROM DUAL; 64 60 63 70

b

When executed, this statement cannot be rolled back ALTER TABLE DROP TABLE REMOVE TABLE DELETE TABLE

b

When executed, this statement cannot be rolled back ALTER TABLE DROP TABLE REMOVE TABLE DELETE TABLE

b

When inserting data into a table form another table, the table names and columns must be the same. True False

b

Which keyword is used to provide an alias to a column? COLUMN AS ALIAS IS

b

Which of the following clauses is used to limit the rows that are retrieved by the query? GROUP BY WHERE ORDER BY FROM

b

Which of the following functions finds the numeric position of a named character? CONCAT INSTR TRIM SUBSTR

b

Which of the following functions is not single-row function? CONCAT SUM UPPER ROUND

b

Which of the following statements about aliases is NOT true? The keyboard AS between an alias and a column name is optional Aliases always require double quotation marks Aliases immediately follows the column name Aliases rename column heading

b

You can nor selectively delete rows a table. True False

b

You can not order the results of a set operation True False

b

You can place the subquery in a number of SQL clauses, including the following: I. WHERE clause II. HAVING clause III. FROM clause I and II I,II and III I only I and III

b

You can update only a single column at a time in a table. True False

b

You can update only a single column at time in a table. True False

b

You cannot drop a user if objects exist in the user's schema. True False

b

You cannot drop a user if objects exist in the user's schema. True False

b

You cannot order the results of a set operation. True False

b

______ clause can be used and is required in the subquery to perform Top-N analysis. HAVING ORDER BY GROUP BY WHERE

b

A subquery must be enclosed in _________ . Double quotes Single quotes Parantheses Braces

c

Comparison conditions fall into two classes: Single-column operators (>, =, >=, <, <>,<=) and multiple-column operators (IN, ANT, ALL) Multiple-row operators (>, =, >=, <, <>,<=) and single-row operators (IN,ANY,ALL) Single-row operators (>, =, >=, <, <>,<=) and multiple-row operators (IN,ANY,ALL) Single-row operators (>, =, >=, <, <>,<=) and multiple-column operators (IN,ANY,ALL)

c

Consider the EMPLOYEES table. Which condition in the WHERE clause limit the employees to those who do not work in the departments 90 and 60? WHERE department_id = 90 AND department_id = 60 WHERE department_id IN (90,60) WHERE department_id NOT IN (90,60) WHERE department_id =90 PR department_id = 60

c

Consider the EMPLOYEES table. Which condition in the WHERE clause limit the employees to those who work in the department prompted by the user? WHERE department_id = '%Department' WHERE department_id LIKE '%Department' WHERE department_id = '&Department' WHERE department_id like '_Department'

c

Consider the EMPLOYEES table. Which condition in the WHERE clause limit the employees to those whose last name and first name starts with the letter 'K'? WHERE last_name = 'K%' and first_name = 'K%' WHERE last_name LIKE 'K_' and first_name LIKE 'K_' WHERE last_name LIKE 'K%' and first_name LIKE 'K%' WHERE last_name and first_name = 'K%'

c

Consider the EMPLOYEES table. Which condition in the WHERE clause limit the employees to those whose salary is greater than 5000 but less than 18000? WHERE salary > 5000 OR salary < 18000 WHERE salary < 5000 AND salary > 18000 WHERE salary > 5000 AND salary < 18000 WHERE salary >5000 AND salary > 18000

c

Consider the EMPLOYEES table. Which of the following statements displays the date in the 'January, 19 1998'? SELECT TO_DATE(hire_date,'fmMONTH, DD YYYY') FROM employees SELECT TO_DATE(hire_date,'fmMonth, DD YYYY') FROM employees SELECT TO_CHAR(hire_date,'fmMonth, DD YYYY') FROM employees SELECT TO_DATE(hire_date,'fmMON, DD YEAR') FROM employees

c

Consider the following SQL statement. What will be the result? SELECT e.last_name, e.salary, d.department_name FROM employees e, departments d WHERE e.department_id = d.department_id An error will occur since none of the JOIN operations is used The Cartesian product of the two tables based on the department_id column will be displayed The last names of the employees and their salaries will be displayed along with the departments names where the employees work An error will occur since in the SELECT clause a column thet is used to join the tables is missing

c

Delete the zip codes 02199 and 43011 from the ZIPCODE table. Make the change permanent. DELETE FROM zipcode WHERE zip ANY ('02199','43011') COMMIT DELETE FROM zipcode WHERE zip ALL ('02199','43011') COMMIT DELETE FROM zipcode WHERE zip IN ('02199','43011') COMMIT DELETE FROM zipcode WHERE zip ANY ('02199','43011')

c

What will be the result of the following SQL statement? SELECT INITCAP(SUBSTR(CONCAT('Hello',world),4,3)) FROM DUAL; LLO Llo Low LOW

c

What will be the result of the following SQL statement? SELECT SUBSTR ('Hello,World!!!',13) FROM DUAL An error will occur, since SUBSTR function need to take 3 parameters Hello,World!!!13 !!! Hello, World!

c

When using LIKE conditions which symbol is used to denote zero or many characters? + * % _

c

Which is right of the following clauses? SELECT... WHERE ... ORDER BY ... GROUP BY SELECT ... FROM ... GROUP BY ... ORDER BY ... WHERE SELECT...FROM...WHERE...GROUP BY...ORDER BY SELECT ... FROM ... WHERE ... ORDER BY ... GROUP BY

c

Which of the following is a concatenation operator? & + || *

c

Which of the following statements is NOT true? SQL statements are no case sensitive Keywords cannot be abbreviated SQL statement can be only one line Keywords cannot be split across lines

c

Consider the EMPLOYEES table. Which of the following displays the maximum average salary for each department? SELECT MAX(AVG(salary)) FROM employees SELECT department_id, MAX(AVG(salary)) FROM employees GROUP BY department_id SELECT AVG(MAX(salary)) FROM employees GROUP BY department_id SELECT MAX(AVG(salary)) FROM employees GROUP BY department_id

d

Consider the SQL statement. Which of the following clauses does not sort the result rows by the salary values in the ascending order? SELECT last_name "Employee", salary "Salary" FROM employees ORDER BY salary; ORDER BY 2; ORDER BY "Salary" ASC; ORDER BY Salary DESC;

d

Queries containing set operators are called __________ . Outer queries Subqueries Inner queries Compound querires

d

Use the _______ operator to return all rows from multiple tables and eliminate any duplicate rows. UNION ALL MINUS INTERSECT UNION

d

What will be the result of the following SQL statement? SELECT count(d.department_name), l.city FROM departments d NATURAL JOIN locations l GROUP BY l.city The number of department in all cities is shown The number if departments in one particular city is shown An error will occur since the GROUP BY clause cannot be used with NATURAL JOIN The number of departments in EACH city is shown.

d

What will be the result of the following SQL statement? (SYSDATE is a date of your exam) SELECT TO_CHAR(SYSDATE, 'DD.MM.YY') FROM Dual; 31.May.2013 An error will occur 31.05.2013 31.05.13

d

Which of the following SQL statements will generate an error? SELECT last_name Name FROM employees WHERE Name like 'K%' SELECT department_id Dep, COUNT(last_name) FROM employees GROUP BY dep SELECT department_id Dep, COUNT(last_name) Num FROM employees GROUP BY department_id HAVING Num>5 SELECT last_name Name FROM employees ORDER BY Name

d

Which statement discards all pending data changes SAVEPOINT COMMIT DISCARD ROLLBACK

d