SQL | Structured Query Language Test

1.

The result of a SQL SELECT statement is a ______.

File
Report
Table
Form

2.

SQL can be used to

Create database structures only
Query database data only
Modify database data only
All of the above can be done by SQL

3.

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;

4.

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

5.

To delete the database __________ Command is used

Drop database_name
Drop database database_name
Delete database_name
Delete database database_name

6.

Select ________ dept_name from instructor;

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

All
From
Distinct
Name

7.

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);

8.

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

9.

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');

10.

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

11.

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

12.

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

ORDER BY
SORT
ORDER
SORT BY

13.

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

CREATE
UPDATE
ALTER
SELECT

14.

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');

15.

Can you validate the statement?

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

True or False?

TRUE
FALSE

16.

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.

17.

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

18.

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%'

19.

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

20.

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

21.

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

22.

If emp_id contains the following set {-1, -2, 2, 3, -3, 1}, what will be the output on the execution of the following MySQL statement?

SELECT emp_id

FROM person

ORDER BY emp_id;

{-3, -2, -1, 1, 2, 3}
{-1, 1, -2, 2, -3, 3}
{1, 2, 3, -1, -2, -3}
None of the mentioned

23.

The HAVING clause does which of the following?

Acts like a WHERE clause but is used for groups rather than rows.
Acts like a WHERE clause but is used for rows rather than columns.
Acts like a WHERE clause but is used for columns rather than groups.
Acts EXACTLY like a WHERE clause.

24.

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 =

25.

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

26.

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

27.

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

28.

You can delete a view with _____________ Command.

DROP VIEW
DELETE VIEW
REMOVE VIEW
TRUNCATE VIEW

29.

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

30.

How to create index idx_pname for multiple columns (Lastname, Firstname) in a Person table?

CREATE INDEX idx_pname ON Person (LastName, FirstName);
CREATE INDEX idx_pname ON Person;
CREATE INDEX idx_pname ON Person (FirstName, LastName);
CREATE INDEX idx_pname Using (LastName, FirstName) ON Persons

31.

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

AND, OR
< , > >, <>

32.

Which of the following clause is mandatorily used in a sub-query?

SELECT
WHERE
ORDER BY
GROUP BY

33.

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

34.

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

35.

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

TRUE
FALSE

36.

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

Order Number
Order Date
Order Location
Order Name

37.

Which of the following is not a Key in SQL Server?

Primary
Foreign
Alternate
Power

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.

By default, which key creates Clustered index?

Foreign Key constraint
Unique Key constraint
Primary Key constraint
None of the above

40.

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

41.

Which type of join is not desirable for retrieval?

Inner
Left
Right
Outer

42.

What is the function of Full Outer Join in SQL?

Matches rows from two tables based on the values in common columns from each table
It includes all rows from the joined tables whether or not the other table has the matching row.Includes unmatched rows from one table and match rows from two tables based on the values in common columns from each table .
Includes unmatched rows from one table and match rows from two tables based on the values in common columns from each table
None of the above

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.

Statement: Join for each row of one table to every row of another table.

Which Join?

Inner
Cartesian
Outer
Left

45.

Can you validate the statement?

Join is different from Inner join.

True or False?

TRUE
FALSE

46.

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

47.

Below image depicts:

SELF JOIN
INNER JOIN
FULL OUTER JOIN
None of the above

48.

In the absence of WHERE condition this JOIN will function like a _______.

Inner
Cartesian
Outer
Left

49.

Can you validate the statement?

Alias is used in Joins.

True or False?

TRUE
FALSE

50.

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);

51.

Which SQL keyword is used to retrieve a maximum value?

MOST
TOP
MAX
UPPER

52.

What values does the count(*) function ignore?

Repetitive values
Null values
Characters
Integers

53.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Max(Salary) from Salesemployee

WHERE Gender = 'Male';

1000
1500
500
200

54.

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;

55.

The SQL Statement

SELECT ROUND(45.926, -1) FROM DUAL;

Is illegal
Prints Garbage
Prints 045.925
Prints 50

56.

Which of the following set of operations is a valid set of Aggregate operations in SQL?

COUNT, MAX, AVG, SUM
MAX, AVG, SUM, SELECT
UNION, COUNT, MIN, DESC
AVG, MIN, MAX, ASC

57.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT SUM(Salary) from Salesemployee

where Name = 'Tom';

1000
500
2500
3000

58.

Which SQL keyword is used to retrieve the highest value?

MOST
TOP
MAX
UPPER

59.

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

60.

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

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

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

Customers Table:
Customer_Number, Customer_Name, Credit_Limit

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 Max(Salary) from Salesemployee
WHERE Gender = 'Male';

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

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

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 ;

STRUCTURED QUERY LANGUAGE TEST

The result of a SQL SELECT statement is a ______.

SQL can be used to

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

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

To delete the database __________ Command is used

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

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?

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

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'

Which of the SQL statement is correct?

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

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

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

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

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

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;

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''?

What is the meaning of the “HAVING” clause 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?

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

If emp_id contains the following set {-1, -2, 2, 3, -3, 1}, what will be the output on the execution of the following MySQL statement? SELECT emp_id FROM person ORDER BY emp_id;

The HAVING clause does which of the following?

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

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;

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;

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

You can delete a view with _____________ Command.

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

How to create index idx_pname for multiple columns (Lastname, Firstname) in a Person table?

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

Which of the following clause is mandatorily used in a sub-query?

Where subqueries can not be used?

Which of the following is true about sub-queries?

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

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

Which of the following is not a Key in SQL Server?

Which of the following is correct DROP INDEX Command?

By default, which key creates Clustered index?

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

Which type of join is not desirable for retrieval?

What is the function of Full Outer Join in SQL?

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?

Statement: Join for each row of one table to every row of another table. Which Join?

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

Choose the query that matches the above image.

Below image depicts:

In the absence of WHERE condition this JOIN will function like a _______.

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?

Which SQL keyword is used to retrieve a maximum value?

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 Gender = 'Male';

Which of the following is incorrect SQL?

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

Which of the following set of operations is a valid set of Aggregate operations in SQL?

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

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 MIN(Salary) from Salesemployee WHERE Gender = 'Female';

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 ;

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Select ________ dept_name from instructor;

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

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

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'

Can you validate the statement?

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

True or False?

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;

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?

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

SELECT emp_id, fname, lname

FROM person

ORDER BY emp_id;

If emp_id contains the following set {-1, -2, 2, 3, -3, 1}, what will be the output on the execution of the following MySQL statement?

SELECT emp_id

FROM person

ORDER BY emp_id;

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;

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;

Can you validate the statement?

An ORDER BY can be used in a subquery.

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?

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?

Statement: Join for each row of one table to every row of another table.

Which Join?

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?

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?

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Max(Salary) from Salesemployee

WHERE Gender = 'Male';

The SQL Statement

SELECT ROUND(45.926, -1) FROM DUAL;

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT SUM(Salary) from Salesemployee

where Name = 'Tom';

Use below table (Salesemployee) and answer the following question

What is the output of following query?

SELECT MIN(Salary) from Salesemployee

WHERE Gender = 'Female';

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 ;

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