SQL | Structured Query Language Test

1.

What is the full form of SQL?

Structured Query Language
Structured Query List
Simple Query Language
None of these

2.

What is the main language of Transact-SQL?

DDL
DML
DCL
None of the above

3.

Which of the following is not a database object?

Stored Procedure
Index
Database Diagram
Powershell

4.

The result of a SQL SELECT statement is a ______.

File
Report
Table
Form

5.

To delete the database __________ Command is used

Drop database_name
Drop database database_name
Delete database_name
Delete database database_name

6.

What is the meaning of the “HAVING” clause in MySQL?

To filter out the row values
To filter out the column values
To filter out the row and column values
None of the mentioned

7.

Select ID, GPA from student grades order by GPA ____________.

In order to give only 10 ranks, on the whole, we should use.

Limit 10
Up to 10
Only 10
Max 10

8.

What is the meaning of the “ORDER BY” clause in MySQL?

Sorting your result
Aggregation of fields
Conditions in SQL
None of the mentioned

9.

We can use one table to create another table using the below query. True or False ?

CREATE TABLE TestTable AS

SELECT customername, contactname

FROM customers;

TRUE
FALSE

10.

Which SQL Query is used for updating the ContactName in the Customers table?

FROM Customers UPDATE ContactName = 'Adam Smith' WHERE CustomerID = 111;
Select Customers Update ContactName = 'Adam Smith' WHERE CustomerID = 111;
UPDATE ContactName = 'Adam Smith' from Customer WHERE CustomerID = 111;
UPDATE Customers SET ContactName = 'Adam Smith' WHERE CustomerID = 111;

11.

Which one is not used in SQL?

Create Table
Create Index
Create Unique Index
Create Table Column

12.

Which SQL keyword is used to sort the result-set?

ORDER BY
SORT
ORDER
SORT BY

13.

Select ID, name, dept name, salary * 1.1 where instructor;

The query given below will not give an error. Which one of the following has to be replaced to get the desired output?

Salary*1.1
ID
Where
Instructor

14.

Analyze the following Query and Mark the answer whether it's a correct query or not?

Select OrderID, Shipdate

From Orders

Where CustomerID=20

Order by Shipdate;

TRUE
FALSE

15.

Syntax for create a views is _______

CREATE VIEW View_name AS SELECT
CREATE VIEW View_name AS UPDATE
CREATE NEW VIEW View_name
CREATE VIEW View_name AS UPDATE

16.

What is the significance of the statement “GROUP BY d.name” in the following MySQL statement?

SELECT d.name, COUNT (emp_id) emp_no

FROM department d INNER JOIN Employee e

ON d.dept_id=e.emp_id

GROUP BY d.name

Aggregation of the field “name” of both table
Aggregation of the field “name” of table “department”
Sorting of the field “name”
None of the mentioned

17.

You need to find out the names of all employees who belong to the same department as the employee 'Jessica Butcher' who is in department 100 and has an employee ID 40. Which of the following queries will be correct?

SELECT first_name, last_name FROM employees WHERE last_name = 'Butcher' And first_name = 'Jessica';
SELECT first_name, last_name FROM employees WHERE department =100;
SELECT first_name, last_name FROM employees WHERE department = (SELECT department FROM employees WHERE first_name = 'Jessica' AND last_name = 'Butcher');
SELECT first_name, last_name FROM employees WHERE department = (SELECT department FROM employees WHERE first_name = 'Jessica' AND last_name = 'Butcher' AND department = 100 AND employee_id = 40);

18.

If you don't specify ASC or DESC after a SQL ORDER BY clause, the following is used by default

ASC
DESC
Order by Randomly
No output

19.

Which of the SQL statement is correct?

Select Username AND Password FROM Users;
Select Username, Password FROM Users;
Select Username, Password Where Username = 'user1';
None of these

20.

Which syntax is used for Drop Index (idx_pname) from the Person table in MYSQL?

DROP INDEX idx_pname;
DROP INDEX index_name from Person;
ALTER TABLE Person DROP INDEX idx_pname;
Cannot drop Index from table

21.

Select two options which do not belong to the Purpose of Delete

It is used to delete a table.
You cannot rollback data.
It is a DML command.
It is used to delete a row in a table.

22.

What is the significance of the statement “HAVING COUNT (emp_id)>2” in the following MySQL statement?

SELECT d.name, COUNT (emp_id) emp_no

FROM department d INNER JOIN Employee e

ON d.dept_id=e.emp_id

GROUP BY d.name

HAVING COUNT (emp_id)>2

Filter out all rows whose total emp_id below 2
Delete the rows whose total emp_id>2
Filter out or select all rows whose total emp_id below 2
None of the mentioned

23.

Find the names of the countries whose condition is sunny

Select country from location where condition = 'sunny';
Select country from location where city IN (Select city from weather WHERE condition = 'sunny');
Select country from location where city NOT IN (SELECT city FROM weather WHERE condition = 'sunny');
SELECT country from location where city UNION (Select city from weather WHERE condition = 'sunny');

24.

Analyse the following Query and Mark the answer whether it's the correct query or not?

SELECT Name, Age, Firstname, Lastname

FROM EMPLOYEE

GROUP BY NAME, SALARY;

TRUE
FALSE

25.

What can be the condition in the "WHERE" clause in a SQL query?

Condition that is to be met for the rows to be returned from result.
Boolean Condition only
Text condition only
None of the above

26.

Analyze the following Query and Mark the answer whether it's the correct query or not ?

select deptName

from Employee

having avg (salary)

group by deptName

where sex = 'M'

TRUE
FALSE

27.

How to delete the Customer name of Alfreds Futterkiste (CustomerID is 1) from the Customers table?

DELETE FROM Customers where CustomerName = Alfreds Futterkiste AND CustomerID = 1
Delete Customers Where ContactName = 'Alfred Schmidt' WHERE CustomerID = 1;
Delete Customers Where ContactName = 'Alfred Schmidt'
Delete Customers SET CustomerName =

28.

What is the significance of “ORDER BY” in the following MySQL statement?

SELECT emp_id, fname, lname

FROM person

ORDER BY emp_id;

Data of lname will be sorted
Data of emp_id will be sorted in descending order
Data of emp_id will be sorted in ascending order
All of the mentioned

29.

Which of the following query is correct for selecting the name of the staff from ''staffinfo'' table where salary is 10000 or 25000?

Select name from staffinfo where salary BETWEEN 10000 AND 25000;
Select name from staffinfo where salary IN 10000 AND 25000;
Both A and B
None of the above

30.

Can you validate the statement?

"ORDER BY" can only be used by WHERE Clause.

True or False?

TRUE
FALSE

31.

A subquery in an SQL SELECT statement is enclosed in

Parenthesis -- (…).
Brackets -- […].
Capital Letters.
Braces--{…}.

32.

Can you validate the statement?

A subquery can be used anywhere an expression is allowed.

True or False?

TRUE
FALSE

33.

Which of the following operators cannot be used in a sub-query?

AND, OR
< , > >, <>

34.

Where subqueries can not be used?

Field names in the SELECT statement
The WHERE clause only in the SELECT statement
The WHERE clause in SELECT as well as all DML statements
The FROM clause in the SELECT statement

35.

Which of the following is true about sub-queries?

They execute after the main query executes
They execute in parallel to the main query
The user can execute the main query and then, if wanted, execute the sub-query
They execute before the main query executes

36.

Does an Index help to speed up?

SELECT queries
WHERE clauses
Both A and B
UPDATE Query

37.

Can you validate the statement?

A column with a Primary key has a Null value.

True or False?

TRUE
FALSE

38.

Can you validate the statement?

We can use the index on columns that contain a high number of NULL values.

True or False?

TRUE
FALSE

39.

How many Primary Keys can have in a table?

1 only
2 only
Depends on no of Columns
Depends on DBA

40.

How many types of indexes are there in the SQL server?

1
2
3
4

41.

Can you validate the statement?

Alias is used in Joins.

True or False?

TRUE
FALSE

42.

Analyze the following tables and output and choose the correct query to achieve the output.

SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders LEFT OUTER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders RIGHT OUTER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders ADD Customers ON Orders.CustomerID=Customers.CustomerID;

43.

Evaluate this SQL statement:

SELECT employee_id, e.department_id, department_name, salary

FROM employees e, departments d

WHERE e.department_id = d.department_id;

Which SQL statement is equivalent to the above SQL statement?

SELECT employee_id, department_id, department_name, salary FROM employees WHERE department_id IN (SELECT department_id FROM departments);
SELECT employee_id, department_id, department_name, salary FROM employees NATURAL JOIN departments;
SELECT employee_id, d.department_id, department_name, salary FROM employees e JOIN departments d ON e.department_id = d.department_id;
SELECT employee_id, department_id, department_name, salary FROM employees JOIN departments USING (e.department_id, d.department_id);

44.

Which type of join is not desirable for retrieval?

Inner
Left
Right
Outer

45.

Below image depicts:

SELF JOIN
INNER JOIN
FULL OUTER JOIN
None of the above

46.

What are the joins available in SQL?

Inner, Outer, Self
Left,Middle, Half
None of above
Both A and B

47.

Analyze the following tables and output and choose the correct query to achieve the output.

SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders LEFT OUTER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders RIGHT OUTER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders FULLY OUTER Customers ON Orders.CustomerID=Customers.CustomerID;

48.

Where are Joins used?

To combine records from two or more tables in a database
Joins used in Data Definition Language
Joins used in aggregate function
SQL combines the result-set of two or more SELECT statements.

49.

Analyze the following tables and output and choose the correct query to achieve the output.

SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders LEFT OUTER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders RIGHT OUTER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders FULLY OUTER Customers ON Orders.CustomerID=Customers.CustomerID;

50.

How many tables may include with a join?

0
1
2
More than 1

51.

The SQL Statement

SELECT ROUND(45.926, -1) FROM DUAL;

Is illegal
Prints Garbage
Prints 045.925
Prints 50

52.

Use below table (Salesemployee) and answer the following question

What is the output of the following query?

SELECT SUM(Salary) from Salesemployee

WHERE Gender = 'Male';

9400
4000
5400
2500

53.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Count(Salary) from Salesemployee

where name Like 'T%';

3
5
1
4

54.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT MAX(Salary) from Salesemployee

WHERE Employee_ID % 2 = 0 ;

5400
9400
2000
2500

55.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT MIN(Salary) from Salesemployee

WHERE Employee_ID % 2 != 0 ;

50
500
200
100

56.

“COUNT” keyword belongs to which categories in MySQL?

Aggregate functions
Operators
Clauses
All of the mentioned

57.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT MAX(Salary) from Salesemployee

WHERE Salary >=2500 and Dept = 'Sales' ;

8
1
2
4

58.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT COUNT(*) from Salesemployee

WHERE Employee_ID % 2 <> 0 ;

8
4
2

59.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT AVG(Salary) from Salesemployee

WHERE Gender = 'Female';

1175
1000
1350
2500

60.

The _____ aggregation operation adds up all the values of the attribute

add
avg
max
sum

SELECT d.name, COUNT (emp_id) emp_no
FROM department d INNER JOIN Employee e
ON d.dept_id=e.emp_id
GROUP BY d.name

SELECT Name, Age, Firstname, Lastname
FROM EMPLOYEE
GROUP BY NAME, SALARY;

SELECT employee_id, e.department_id, department_name, salary
FROM employees e, departments d
WHERE e.department_id = d.department_id;

Use below table (Salesemployee) and answer the following question
What is the output of following query ?

SELECT Count(Salary) from Salesemployee
where name Like 'T%';

Use below table (Salesemployee) and answer the following question
What is the output of following query ?
SELECT MAX(Salary) from Salesemployee
WHERE Employee_ID % 2 = 0 ;

Use below table (Salesemployee) and answer the following question
What is the output of following query ?
SELECT MIN(Salary) from Salesemployee
WHERE Employee_ID % 2 != 0 ;

Use below table (Salesemployee) and answer the following question
What is the output of following query ?
SELECT COUNT(*) from Salesemployee
WHERE Employee_ID % 2 <> 0 ;

Use below table (Salesemployee) and answer the following question
What is the output of following query ?
SELECT AVG(Salary) from Salesemployee
WHERE Gender = 'Female';

STRUCTURED QUERY LANGUAGE TEST

What is the full form of SQL?

What is the main language of Transact-SQL?

Which of the following is not a database object?

The result of a SQL SELECT statement is a ______.

To delete the database __________ Command is used

What is the meaning of the “HAVING” clause in MySQL?

Select ID, GPA from student grades order by GPA ____________. In order to give only 10 ranks, on the whole, we should use.

What is the meaning of the “ORDER BY” clause in MySQL?

We can use one table to create another table using the below query. True or False ? CREATE TABLE TestTable AS SELECT customername, contactname FROM customers;

Which SQL Query is used for updating the ContactName in the Customers table?

Which one is not used in SQL?

Which SQL keyword is used to sort the result-set?

Select ID, name, dept name, salary * 1.1 where instructor; The query given below will not give an error. Which one of the following has to be replaced to get the desired output?

Analyze the following Query and Mark the answer whether it's a correct query or not? Select OrderID, Shipdate From Orders Where CustomerID=20 Order by Shipdate;

Syntax for create a views is _______

What is the significance of the statement “GROUP BY d.name” in the following MySQL statement? SELECT d.name, COUNT (emp_id) emp_no FROM department d INNER JOIN Employee e ON d.dept_id=e.emp_id GROUP BY d.name

You need to find out the names of all employees who belong to the same department as the employee 'Jessica Butcher' who is in department 100 and has an employee ID 40. Which of the following queries will be correct?

If you don't specify ASC or DESC after a SQL ORDER BY clause, the following is used by default

Which of the SQL statement is correct?

Which syntax is used for Drop Index (idx_pname) from the Person table in MYSQL?

Select two options which do not belong to the Purpose of Delete

What is the significance of the statement “HAVING COUNT (emp_id)>2” in the following MySQL statement? SELECT d.name, COUNT (emp_id) emp_no FROM department d INNER JOIN Employee e ON d.dept_id=e.emp_id GROUP BY d.name HAVING COUNT (emp_id)>2

Find the names of the countries whose condition is sunny

Analyse the following Query and Mark the answer whether it's the correct query or not? SELECT Name, Age, Firstname, Lastname FROM EMPLOYEE GROUP BY NAME, SALARY;

What can be the condition in the "WHERE" clause in a SQL query?

Analyze the following Query and Mark the answer whether it's the correct query or not ? select deptName from Employee having avg (salary) group by deptName where sex = 'M'

How to delete the Customer name of Alfreds Futterkiste (CustomerID is 1) from the Customers table?

What is the significance of “ORDER BY” in the following MySQL statement? SELECT emp_id, fname, lname FROM person ORDER BY emp_id;

Which of the following query is correct for selecting the name of the staff from ''staffinfo'' table where salary is 10000 or 25000?

Can you validate the statement? "ORDER BY" can only be used by WHERE Clause. True or False?

A subquery in an SQL SELECT statement is enclosed in

Can you validate the statement? A subquery can be used anywhere an expression is allowed. True or False?

Which of the following operators cannot be used in a sub-query?

Where subqueries can not be used?

Which of the following is true about sub-queries?

Does an Index help to speed up?

Can you validate the statement? A column with a Primary key has a Null value. True or False?

Can you validate the statement? We can use the index on columns that contain a high number of NULL values. True or False?

How many Primary Keys can have in a table?

How many types of indexes are there in the SQL server?

Can you validate the statement? Alias is used in Joins. True or False?

Analyze the following tables and output and choose the correct query to achieve the output.

Evaluate this SQL statement: SELECT employee_id, e.department_id, department_name, salary FROM employees e, departments d WHERE e.department_id = d.department_id; Which SQL statement is equivalent to the above SQL statement?

Which type of join is not desirable for retrieval?

Below image depicts:

What are the joins available in SQL?

Analyze the following tables and output and choose the correct query to achieve the output.

Where are Joins used?

Analyze the following tables and output and choose the correct query to achieve the output.

How many tables may include with a join?

The SQL Statement SELECT ROUND(45.926, -1) FROM DUAL;

Use below table (Salesemployee) and answer the following question What is the output of the following query? SELECT SUM(Salary) from Salesemployee WHERE Gender = 'Male';

Use below table (Salesemployee) and answer the following question What is the output of following query ? SELECT Count(Salary) from Salesemployee where name Like 'T%';

Use below table (Salesemployee) and answer the following question What is the output of following query ? SELECT MAX(Salary) from Salesemployee WHERE Employee_ID % 2 = 0 ;

Use below table (Salesemployee) and answer the following question What is the output of following query ? SELECT MIN(Salary) from Salesemployee WHERE Employee_ID % 2 != 0 ;

“COUNT” keyword belongs to which categories in MySQL?

Use below table (Salesemployee) and answer the following question What is the output of following query ? SELECT MAX(Salary) from Salesemployee WHERE Salary >=2500 and Dept = 'Sales' ;

Use below table (Salesemployee) and answer the following question What is the output of following query ? SELECT COUNT(*) from Salesemployee WHERE Employee_ID % 2 <> 0 ;

Use below table (Salesemployee) and answer the following question What is the output of following query ? SELECT AVG(Salary) from Salesemployee WHERE Gender = 'Female';

The _____ aggregation operation adds up all the values of the attribute

Assessment complete! Thank you for you time. We are redirecting you to the result page, Please click on 'SUBMIT'

Select ID, GPA from student grades order by GPA ____________.

In order to give only 10 ranks, on the whole, we should use.

We can use one table to create another table using the below query. True or False ?

CREATE TABLE TestTable AS

SELECT customername, contactname

FROM customers;

Select ID, name, dept name, salary * 1.1 where instructor;

The query given below will not give an error. Which one of the following has to be replaced to get the desired output?

Analyze the following Query and Mark the answer whether it's a correct query or not?

Select OrderID, Shipdate

From Orders

Where CustomerID=20

Order by Shipdate;

What is the significance of the statement “GROUP BY d.name” in the following MySQL statement?

SELECT d.name, COUNT (emp_id) emp_no

FROM department d INNER JOIN Employee e

ON d.dept_id=e.emp_id

GROUP BY d.name

What is the significance of the statement “HAVING COUNT (emp_id)>2” in the following MySQL statement?

SELECT d.name, COUNT (emp_id) emp_no

FROM department d INNER JOIN Employee e

ON d.dept_id=e.emp_id

GROUP BY d.name

HAVING COUNT (emp_id)>2

Analyse the following Query and Mark the answer whether it's the correct query or not?

SELECT Name, Age, Firstname, Lastname

FROM EMPLOYEE

GROUP BY NAME, SALARY;

Analyze the following Query and Mark the answer whether it's the correct query or not ?

select deptName

from Employee

having avg (salary)

group by deptName

where sex = 'M'

What is the significance of “ORDER BY” in the following MySQL statement?

SELECT emp_id, fname, lname

FROM person

ORDER BY emp_id;

Can you validate the statement?

"ORDER BY" can only be used by WHERE Clause.

True or False?

Can you validate the statement?

A subquery can be used anywhere an expression is allowed.

True or False?

Can you validate the statement?

A column with a Primary key has a Null value.

True or False?

Can you validate the statement?

We can use the index on columns that contain a high number of NULL values.

True or False?

Can you validate the statement?

Alias is used in Joins.

True or False?

Evaluate this SQL statement:

SELECT employee_id, e.department_id, department_name, salary

FROM employees e, departments d

WHERE e.department_id = d.department_id;

Which SQL statement is equivalent to the above SQL statement?

The SQL Statement

SELECT ROUND(45.926, -1) FROM DUAL;

Use below table (Salesemployee) and answer the following question

What is the output of the following query?

SELECT SUM(Salary) from Salesemployee

WHERE Gender = 'Male';

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Count(Salary) from Salesemployee

where name Like 'T%';

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT MAX(Salary) from Salesemployee

WHERE Employee_ID % 2 = 0 ;

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT MIN(Salary) from Salesemployee

WHERE Employee_ID % 2 != 0 ;

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT MAX(Salary) from Salesemployee

WHERE Salary >=2500 and Dept = 'Sales' ;

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT COUNT(*) from Salesemployee

WHERE Employee_ID % 2 <> 0 ;

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT AVG(Salary) from Salesemployee

WHERE Gender = 'Female';

Assessment complete! Thank you for you time.
We are redirecting you to the result page, Please click on 'SUBMIT'