SQL | Structured Query Language Test

1.

Which one is not part of the Database backup file?

Full
Differential
Transaction log
Backup log

2.

What is the full form of SQL?

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

3.

Which is the subset of SQL command used to manipulate Database structures, including tables?

Data Definition Language
Data Manipulation Language
Both of above
None of the above

4.

What is the SQL query used to retrieve all the data from the customer table?

SELECT COLUMN FROM Customers;
SELECT All FROM Customers;
SELECT * FROM Customers;
SELECT All COLUMN FROM Customers;

5.

The result of a SQL SELECT statement is a ______.

File
Report
Table
Form

6.

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 =

7.

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

8.

With SQL, how do you select all the records from a table named "Persons" where the value of the column "Firstname" ends with an ''a''?

Select * from Persons where Firstname='a'
Select * from Persons where Firstname Like 'a%'
Select * from Persons where Firstname like '%a'
Select * from Persons where Firstname='%a%'

9.

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

10.

You can delete a view with _____________ Command.

DROP VIEW
DELETE VIEW
REMOVE VIEW
TRUNCATE VIEW

11.

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

ORDER BY
SORT
ORDER
SORT BY

12.

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);

13.

Can you validate the statement?

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

True or False?

TRUE
FALSE

14.

With SQL, how can you return all the records from a table named "Persons" sorted descending by "FirstName"?

Select * from Persons SORT BY "FirstName" DESC;
Select * from Persons SORT "FirstName" DESC;
Select * from Persons ORDER BY "FirstName" DESC;
Select * from Persons ORDER "FirstName" DESC;

15.

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

16.

Find the name of these cities with temperature and condition whose condition is neither sunny nor cloudy

Select city, temperature, condition FROM weather Where condition NOT IN ('sunny', 'cloudy');
Select city, temperature, condition FROM weather Where condition NOT between ('sunny', 'cloudy');
Select city, temperature, condition FROM weather Where condition IN ('sunny', 'cloudy');
Select city, temperature, condition FROM weather Where condition between ('sunny', 'cloudy');

17.

Select ________ dept_name from instructor;

Here which of the following displays the unique values of the column?

All
From
Distinct
Name

18.

The ___ clause allows us to select only those rows in the result relation of the clause that satisfy a specified predicate.

Where, from
From, select
Select, from
From, where

19.

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

20.

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

21.

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');

22.

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

23.

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.

24.

Which command is used to change the definition of a table in SQL ?

CREATE
UPDATE
ALTER
SELECT

25.

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

26.

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

27.

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

28.

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

29.

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

30.

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;

31.

Which of the following statement(s) is TRUE regarding subqueries?

Outer query and inner query can get data from different tables
Outer query and inner query must get data from the same table

32.

A subquery in an SQL SELECT statement is enclosed in

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

33.

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

TRUE
FALSE

34.

What is "Subquery"?

Used for create new database
Using Where clause in query
Query with in a query
Joining multiple tables together

35.

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

AND, OR
< , > >, <>

36.

Can you validate the statement?

A table contains more than one foreign key

True or False?

TRUE
FALSE

37.

Which key accepts multiple NULL values?

Foreign Key
Unique Key
Primary Key
None of the above

38.

Which of the following is correct DROP INDEX Command?

DROP INDEX table_name;
DROP INDEX index_name;
DROP INDEX index_name or table_name;
DELETE INDEX index_name;

39.

Which one of the following can be taken as a Primary Key?

Order Number
Order Date
Order Location
Order Name

40.

Can you validate the statement?

A column with a Primary key has a Null value.

True or False?

TRUE
FALSE

41.

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);

42.

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.

43.

List all orders, showing order number, customer name and credit limit of a customer.

Orders Table:

Order_Number, Customer, Product_Amount

Customers Table:

Customer_Number, Customer_Name, Credit_Limit

Which of the below query satisfy the above question?

Select Order_Numer, Customer_Name, Credit_Limit from Customers, Orders where Customer = Customer_Number;
Select Order_Numer, Customer_Name, Credit_Limit from Customers INNER JOIN Orders ON Customers.Customer_Number = Orders.Customer;;
Both
None

44.

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;

45.

Choose the query that matches the above image.

Select [List] from [Table A] A inner join [Table B] B on A.value=B.value
Select [List] from [Table A] A full outer join [Table B] B on A.value=B.value where A.value is null or B.value is null
Select [List] from [Table A] A right join [Table B] B on A.value=B.value where A.value is null
Select [List] from [Table A] A full outer join [Table B] B on A.value=B.value

46.

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;

47.

Can you validate the statement?

Join is different from Inner join.

True or False?

TRUE
FALSE

48.

Choose the correct query for the below scenario.

SELECT * FROM employees RIGHT departments ON employees.department_id = departments.department_id;
SELECT * FROM employees LEFT departments ON employees.department_id = departments.department_id;
SELECT * FROM employees JOIN departments ON employees.department_id = departments.department_id;
SELECT * FROM employee JOIN department ON employee.department_id = department.department_id;

49.

What is the syntax for joining two tables? Pick Two

SELECT Column Names FROM Table 1 JOIN Table 2 ON Condition JOIN Table 3 ON Condition
SELECT * FROM Table 1 JOIN Table 2 ON Condition JOIN Table 3 ON Condition
SELECT Column from Table 1 Join Table 2, Table 3 ON Condition
SELECT Column from Table 1 AND SELECT Column from Table 2

50.

Can you validate the statement?

Alias is used in Joins.

True or False?

TRUE
FALSE

51.

Which of the following is incorrect SQL?

Select max(Marks) from student;
Select sum(Marks) from student;
Select max(Marks1+Marks2) from student;
Select max(Marks1, Marks2) from student;

52.

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

53.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Count(*) from Salesemployee

WHERE Salary >500;

8
6
2
4

54.

Which among the following belongs to an “aggregate function”?

COUNT
UPPER
LOWER
All of the mentioned

55.

Which SQL keyword is used to retrieve the highest value?

MOST
TOP
MAX
UPPER

56.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Count(Salary) from Salesemployee

where name Like 'S%';

3
5
8
4

57.

In SQL - these functions - AVG, MIN, MAX, COUNT are called as ___________

Aggregate function
Adjunct function
Set Operation
Scalar Operation

58.

What values does the count(*) function ignore?

Repetitive values
Null values
Characters
Integers

59.

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

60.

Use below table (Salesemployee) and answer the following question

What is the output of following query?

SELECT MIN(Salary) from Salesemployee

WHERE Gender = 'Female';

200
700
2000
2500

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;

Customers Table:
Customer_Number, Customer_Name, Credit_Limit

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 Salary >500;

SELECT Count(Salary) from Salesemployee
where name Like 'S%';

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

STRUCTURED QUERY LANGUAGE TEST

Which one is not part of the Database backup file?

What is the full form of SQL?

Which is the subset of SQL command used to manipulate Database structures, including tables?

What is the SQL query used to retrieve all the data from the customer table?

The result of a SQL SELECT statement is a ______.

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

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

With SQL, how do you select all the records from a table named "Persons" where the value of the column "Firstname" ends with an ''a''?

Which of the SQL statement is correct?

You can delete a view with _____________ Command.

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

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?

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

With SQL, how can you return all the records from a table named "Persons" sorted descending by "FirstName"?

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

Find the name of these cities with temperature and condition whose condition is neither sunny nor cloudy

Select ________ dept_name from instructor; Here which of the following displays the unique values of the column?

The _______ clause allows us to select only those rows in the result relation of the ____ clause that satisfy a specified predicate.

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

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;

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

Which command is used to change the definition of a table in SQL ?

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

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

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

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;

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

Which of the following statement(s) is TRUE regarding subqueries?

A subquery in an SQL SELECT statement is enclosed in

Can you validate the statement? An ORDER BY can be used in a subquery. True or False?

What is "Subquery"?

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

Can you validate the statement? A table contains more than one foreign key True or False?

Which key accepts multiple NULL values?

Which of the following is correct DROP INDEX Command?

Which one of the following can be taken as a Primary Key?

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

Where are Joins used?

List all orders, showing order number, customer name and credit limit of a customer. Orders Table: Order_Number, Customer, Product_Amount Customers Table: Customer_Number, Customer_Name, Credit_Limit Which of the below query satisfy the above question?

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

Choose the query that matches the above image.

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

Can you validate the statement? Join is different from Inner join. True or False?

Choose the correct query for the below scenario.

What is the syntax for joining two tables? Pick Two

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

Which of the following is incorrect SQL?

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 Salary >500;

Which among the following belongs to an “aggregate function”?

Which SQL keyword is used to retrieve the highest value?

Use below table (Salesemployee) and answer the following question What is the output of following query ? SELECT Count(Salary) from Salesemployee where name Like 'S%';

In SQL - these functions - AVG, MIN, MAX, COUNT are called as ___________

What values does the count(*) function ignore?

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 Gender = 'Female';

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Can you validate the statement?

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

True or False?

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

SELECT emp_id, fname, lname

FROM person

ORDER BY emp_id;

Select ________ dept_name from instructor;

Here which of the following displays the unique values of the column?

The ___ clause allows us to select only those rows in the result relation of the clause that satisfy a specified predicate.

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;

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;

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

Can you validate the statement?

A table contains more than one foreign key

True or False?

Can you validate the statement?

A column with a Primary key has a Null value.

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?

List all orders, showing order number, customer name and credit limit of a customer.

Orders Table:

Order_Number, Customer, Product_Amount

Customers Table:

Customer_Number, Customer_Name, Credit_Limit

Which of the below query satisfy the above question?

Can you validate the statement?

Join is different from Inner join.

True or False?

Can you validate the statement?

Alias is used in Joins.

True or False?

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 Salary >500;

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Count(Salary) from Salesemployee

where name Like 'S%';

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 Gender = 'Female';

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