A DISTINCT must always be user in the top-most SELECT statement of a set operation
A parent table referenced by a child table may not be dropped
A SELECT statement that is embedded in a clause of another SELECT statement is called
Main query
Subquery
Inner query
Outer query
A subquery must be enclosed in _________ .
Double quotes
Single quotes
Parantheses
Braces
A table can be created with or without data
Any user can grant or revoke ant type of system privileges to or from another user.
Both object and system privileges can be granted through a single role to a user.
By default, the foreign key restricts deletes of any parent row that has a corresponding child row(s).
Comparison conditions fall into two classes:
Single-column operators (>, \=, >\=, <, <>,<\=) and multiple-column operators (IN, ANT, ALL)
Single-row operators (>, \=, >\=, <, <>,<\=) and multiple-column operators (IN,ANY,ALL)
Single-row operators (>, \=, >\=, <, <>,<\=) and multiple-row operators (IN,ANY,ALL)
Multiple-row operators (>, \=, >\=, <, <>,<\=) and single-row operators (IN,ANY,ALL)
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'
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
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%'
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
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'
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,'fmMON, DD YEAR') FROM employees
SELECT TO_CHAR(hire_date,'fmMonth, DD YYYY') FROM employees
SELECT TO_DATE(hire_date,'fmMonth, DD YYYY') FROM employees
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
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 MAX(AVG(salary)) FROM employees GROUP BY department_id
SELECT AVG(MAX(salary)) FROM employees GROUP BY department_id
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;
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, COUNT(last_name) FROM departments GROUP_BY last_name
SELECT department_id, department_name, COUNT(last_name) FROM employees GROUP BY department_id
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
An error will occur since in the SELECT clause a column thet is used to join the tables is missing
The last names of the employees and their salaries will be displayed along with the departments names where the employees work
The Cartesian product of the two tables based on the department_id column will be displayed
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;
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
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 ANY ('02199','43011')
DELETE FROM zipcode WHERE zip IN ('02199','43011') COMMIT
DELETE FROM zipcode WHERE zip ALL ('02199','43011') COMMIT
Constraints always have a name.
DML statement such as INSERT, UPDATE, DELETE, and MERGE obtain a lock on the row(s), so other users cannot manipulate it.
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;
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.
Privileges, roles, and synonyms are all used to implement security in an Oracle Database.
Queries containing set operators are called ______ .
Compound queries
Subqueries
Inner queries
Outer queries
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
Queries that return only one row from the inner SELECT statement are called
Single-column subqueries
What will be the result of the following SQL statement? SELECT INITCAP(SUBSTR(CONCAT('Hello',world),4,3)) FROM DUAL;
LLO
Llo
Low
LOW
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 of departments in EACH city is shown.
An error will occur since the GROUP BY clause cannot be used with NATURAL JOIN
The number if departments in one particular city is shown
What will be the result of the following query? SELECT ROUND (63.548, -1) FROM DUAL;
64
60
63
70
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!
The ______ operator compares a value to every value returned by a subquery.
NOT
ALL
SOME
ANY
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.
The data dictionary view USER_TAB_PRIVS_MADE lists details of table privilege grants performed by the current user.
The data of a temporary table is visible to all session.
The NUMBER data types is usually the best choice for a primary key.
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
The TRANCATE command and the TRUNC function can be used interchangeably.
The TRUNCATE command removes all data permanently from a table.
The UNION and UNION ALL set operator have the opposite effect other.
The ____ operator compares a value to EACH value returned by a subquery
The ____ operator returns all rows that are selected by either query
UNION ALL
INTERSECT
UNION
MINUS
The ______ constraint defines a condition that each row must satisfy.
PRIMARY KEY
CHECK
UNIQUE
FOREIGN KEY
To obtain a list of last names that students and instructors share, you use the MINUS set operator
Transaction control determines when data manipulates becomes permanent in a database.
Use the _____ operator to return all rows from multiple tables and eliminate any duplicate rows.
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
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
31.05.13
When executed, this statement cannot be rolled back
ALTER TABLE
DROP TABLE
REMOVE TABLE
DELETE TABLE
When inserting data into a table form another table, the table names and columns must be the same.
When using LIKE condition which symbol is used to denote one character?
_
+
%
*
When using LIKE conditions which symbol is used to denote zero or many characters?
Which command is used to view the structure of the table LOCATIONS?
DESCRIBE LOCATIONS
SHOW STRUCTURE LOCATIONS
SELECT * FROM LOCATIONS
PRINT LOCATIONS
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
Which keyword is used to eliminate duplicate rows in the result?
DISTINCT
DESCRIBE
HAVING
GROUP BY
Which keyword is used to provide an alias to a column?
COLUMN
AS
ALIAS
IS
Which of the following clauses is used to limit the rows that are retrieved by the query?
WHERE
ORDER BY
FROM
Which of the following functions finds the numeric position of a named character?
CONCAT
INSTR
TRIM
SUBSTR
Which of the following functions is not single-row function?
SUM
UPPER
ROUND
Which of the following functions joins two strings together?
Which of the following is a concatenation operator?
&
||
Which of the following SQL statements will generate an error?
SELECT last_name Name FROM employees WHERE Name like 'K%'
SELECT last_name Name FROM employees ORDER BY Name
SELECT department_id Dep, COUNT(last_name) Num FROM employees GROUP BY department_id HAVING Num>5
SELECT department_id Dep, COUNT(last_name) FROM employees GROUP BY dep
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
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
Which statement discards all pending data changes
SAVEPOINT
COMMIT
DISCARD
ROLLBACK
Which symbol do you use if you need to choose all the columns from the table to the result query?
All
Which symbol is used to create a substitution variable?{
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 deptno group by emp having count(*)>3;
Select deptno, count (emp) from deptno group by emp having count(*)>2;
Select deptno, count (deptno) from emp group by deptno having count(*)>2;
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);
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*0.1 where empno in (select mgr from emo);
Update emp set sal\=sal*0.1 where empno in (select emp from emo);
Update emp set sal\=sal*1.1 where empno in (select emp from emo);
You can add and drop columns from a table using the ALTER TABLE command.
You can nor (not?) selectively delete rows a table.
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
You can update only a single column at a time in a table.
You cannot drop a user if objects exist in the user's schema.
You cannot order the results of a set operation
______ clause can be used and is required in the subquery to perform Top-N analysis.
