Oracle_test6
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This is a basic SQL test
- 1.You issue the following query: SELECT salary "Employee Salary" FROM employees; How will the column heading appear in the result?
- A.
EMPLOYEE SALARY
- B.
EMPLOYEE_SALARY
- C.
Employee Salary
- D.
Employee_salary
- 2.The EMP table is defined as follows: EMP Table Datatype Length Empno(NUMBER) 4 Ename(VARCHAR2) 30 Sal(NUMBER) 14,2 Bonus(NUMBER) 10,2 Deptno(NUMBER) 2 You perform the following two queries: SELECT empno enumber, ename FROM emp ORDER BY 1; SELECT empno, ename FROM emp ORDER BY empno ASC; Which of the following is true?
- A.
Statements 1 and 2 will produce the same result.
- B.
Statement 1 will execute; statement 2 will return an error
- C.
Statement 2 will execute; statement 1 will return an error.
- D.
Statements 1 and 2 will execute but produce different results
- 3.You issue the following SELECT statement on the EMP table . SELECT (200+((salary*0.1)/2)) FROM emp;What will happen to the result if all of the parentheses are removed
- A.
No difference, because the answer will always be NULL
- B.
No difference, because the result will be the same.
- C.
The result will be higher
- D.
The result will be lower
- 4.In the following SELECT statement, which component is a literal? SELECT 'Employee Name: ' || ename FROM emp where deptno = 10;
- A.
10
- B.
Ename
- C.
Employee Name:
- D.
||
- 5.When you try to save 34567.2255 into a column defined as NUMBER(7,2) what value is actually saved?
- A.
34567.00
- B.
34567.23
- C.
34567.22
- D.
3456.22
- 6.What is the default display length of the DATE datatype column?
- A.
8
- B.
9
- C.
19
- D.
6
- 7.What will happen if you query the EMP table shown in question 2 with the following? SELECT empno, DISTINCT ename, salary FROM emp;
- A.
EMPNO, unique values of ENAME and then SALARY are displayed.
- B.
EMPNO, unique values of the two columns, ENAME and SALARY, are displayed
- C.
DISTINCT is not a valid keyword in SQL
- D.
No values will be displayed because the statement will return an error.
- 8.Which clause in a query limits the rows selected?
- A.
ORDER BY
- B.
WHERE
- C.
SELECT
- D.
FROM
- 9.The following listing shows the records of the EMP table. EMPNO ENAME SALARY COMM DEPTNO --------- ---------- --------- --------- --------- 7369 SMITH 800 20 7499 ALLEN 1600 300 30 7521 WARD 1250 500 30 7566 JONES 2975 20 7654 MARTIN 1250 1400 30 7698 BLAKE 2850 30 7782 CLARK 2450 24500 10 7788 SCOTT 3000 20 7839 KING 5000 50000 10 7844 TURNER 1500 0 30 7876 ADAMS 1100 20 7900 JAMES 950 30 7902 FORD 3000 20 7934 MILLER 1300 13000 10When you issue the following query Which value will be displayed in the first row? SELECT empno FROM emp WHERE deptno = 10 ORDER BY ename DESC
- A.
MILLER
- B.
7934
- C.
7876
- D.
No rows will be returned ename cannot be used in the ORDER BY clause
- 10.The following listing shows the records of the EMP table. EMPNO ENAME SALARY COMM DEPTNO --------- ---------- --------- --------- --------- 7369 SMITH 800 20 7499 ALLEN 1600 300 30 7521 WARD 1250 500 30 7566 JONES 2975 20 7654 MARTIN 1250 1400 30 7698 BLAKE 2850 30 7782 CLARK 2450 24500 10 7788 SCOTT 3000 20 7839 KING 5000 50000 10 7844 TURNER 1500 0 30 7876 ADAMS 1100 20 7900 JAMES 950 30 7902 FORD 3000 20 7934 MILLER 1300 13000 10 How many rows will the following query return? SELECT * FROM emp WHERE ename BETWEEN 'A' AND 'C'
- A.
4
- B.
2
- C.
A character column cannot be used in the BETWEEN operator
- D.
3
- 11.) Refer to the EMP table in question 2. When you issue the following query, which line has an error? 1)SELECT empno "Enumber", ename "EmpName" 2) FROM emp 3)WHERE deptno = 10 4) AND "Enumber" = 7782 5)ORDER BY "Enumber";
- A.
1
- B.
5
- C.
4
- D.
No error; the statement will finish successfully
- 12.You issue the following query: SELECT empno, ename FROM emp WHERE empno = 7782 OR empno = 7876; Which other operator can replace the OR condition in the WHERE clause?
- A.
.IN
- B.
BETWEEN .. AND
- C.
LIKE
- D.
- E.
.>=
- 13.The following are clauses of the SELECT statement: In which order should they appear in a query? 1) WHERE 2) FROM 3) ORDER BY
- A.
. 1, 3, 2
- B.
2, 1, 3
- C.
2, 3, 1
- D.
The order of these clauses does not matter.
- 14.Which statement searches for PRODUCT_ID values that begin with DI_ from the ORDERS table?
- A.
SELECT * FROM ORDERS WHERE PRODUCT_ID = 'DI%';
- B.
SELECT * FROM ORDERS WHERE PRODUCT_ID LIKE 'DI_' ESCAPE '\';
- C.
SELECT * FROM ORDERS WHERE PRODUCT_ID LIKE 'DI\_%' ESCAPE '\';
- D.
SELECT * FROM ORDERS WHERE PRODUCT_ID LIKE 'DI\_' ESCAPE '\';
- E.
SELECT * FROM ORDERS WHERE PRODUCT_ID LIKE 'DI_%' ESCAPE '\';
- 15.COUNTRY_NAME and REGION_ID are valid column names in the COUNTRIES table. Which one of the following statements will execute without an error?
- A.
SELECT country_name, region_id, CASE region_id = 1 THEN 'Europe', region_id = 2 THEN 'America', region_id = 3 THEN 'Asia', ELSE 'Other' END Continent FROM countries;
- B.
. SELECT country_name, region_id, CASE (region_id WHEN 1 THEN 'Europe', WHEN 2 THEN 'America', WHEN 3 THEN 'Asia', ELSE 'Other') Continen FROM countries;
- C.
SELECT country_name, region_id CASE region_id WHEN 1 THEN 'Europe' WHEN 2 THEN 'America' WHEN 3 THEN 'Asia' ELSE 'Other' END Continent FROM countries;
- D.
SELECT country_name, region_id, CASE region_id WHEN 1 THEN 'Europe' WHEN 2 THEN 'America' WHEN 3 THEN 'Asia' ELSE 'Other' Continent FROM countries;
- 16.Which special character is used to query all the columns from the table without listing each column by name?
- A.
%
- B.
&
- C.
@
- D.
*
- 17.The EMPLOYEE table has the following data: EMP_NAME HIRE_DATE SALARY ---------- --------- ---------- SMITH 17-DEC-90 800 ALLEN 20-FEB-91 1600 WARD 22-FEB-91 1250JONES 02-APR-91 5975 WARDEN 28-SEP-91 1250 BLAKE 01-MAY-91 2850 What will be the value in the first row of the result set when the following query is executed? SELECT hire_date FROM employee ORDER BY salary, emp_name
- A.
02-APR-91
- B.
17-DEC-90
- C.
28-SEP-91
- D.
The query is invalid, because you cannot have a column in the ORDER BY that is not part of the SELECT clause.
- 18.When doing pattern matching using the LIKE operator, which character is used as the default escape character by Oracle?
- A.
|
- B.
/
- C.
\
- D.
There is no default escape character in Oracle9i
- 19.Column alias names cannot be used in which clause?
- A.
SELECT
- B.
WHERE
- C.
ORDER BY
- D.
None of the above
- 20.Which SQL statement will query the EMPLOYEES table for FIRST_NAME, LAST_NAME, and SALARY of all employees in DEPARTMENT_ID 40 in the alphabetical order of last name?
- A.
SELECT first_name last_name salary FROM employees ORDER BY last_name WHERE department_id = 40;
- B.
SELECT first_name, last_name, salary FROM employees ORDER BY last_name ASC WHERE department_id = 40;
- C.
SELECT first_name last_name salary FROM employees WHERE department_id = 40 ORDER BY last_name ASC;
- D.
SELECT first_name, last_name, salary FROM employees WHERE department_id = 40 ORDER BY last_name;
- E.
SELECT first_name, last_name, salary FROM TABLE employees WHERE department_id IS 40 ORDER BY last_name ASC;
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