SQL | Structured Query Language Test

1.

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;

2.

Which one is a non-relational database?

Postgre
MySQL
MariaDB
MongoDB

3.

What is the full form of SQL?

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

4.

What does a DML Stand for?

Different Mode Level
Data Model Language
Data Mode Lane
Data Manipulation Language

5.

In SQL, which command is used to change a table's storage characteristics?

Alter Table
Modify Table
Change Table
None of these

6.

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

7.

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

8.

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);

9.

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');

10.

Which one is not used in SQL?

Create Table
Create Index
Create Unique Index
Create Table Column

11.

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%'

12.

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

13.

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 =

14.

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;

15.

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

16.

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

17.

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

18.

You can delete a view with _____________ Command.

DROP VIEW
DELETE VIEW
REMOVE VIEW
TRUNCATE VIEW

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.

Select ________ dept_name from instructor;

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

All
From
Distinct
Name

21.

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

22.

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

CREATE
UPDATE
ALTER
SELECT

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.

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

25.

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

26.

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

27.

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

28.

The SQL WHERE clause used for

limits the column data that are returned.
limits the row data are returned.
Both A and B are correct.
Neither A nor B are correct.

29.

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');

30.

Find all the cities whose humidity is 89

Select city where humidity = 89;
Select city from weather where humidity = 89;
Select humidity = 89 from weather;
Select city from Weather;

31.

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

SELECT
WHERE
ORDER BY
GROUP BY

32.

What is "Subquery"?

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

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.

Which of the following statements are TRUE regarding subqueries?

A subquery can retrieve zero or more rows
A subquery can appear on either side of a comparison operator
There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement
Both A and B

36.

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

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?

A table contains more than one foreign key

True or False?

TRUE
FALSE

39.

A ______ index is created based on only one table column.

Implicit
Unique
single-column
Composite

40.

How many Primary Keys can have in a table?

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

41.

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.

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

43.

Can you validate the statement?

Join is different from Inner join.

True or False?

TRUE
FALSE

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 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;

45.

How many tables may include with a join?

0
1
2
More than 1

46.

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

47.

In which two cases would you use an outer join? (Choose two.)

The tables being joined have NOT NULL columns.
The tables being joined have both matched and unmatched data.
The columns being joined have NULL values.
The tables being joined have only unmatched data.

48.

Can you validate the statement?

Alias is used in Joins.

True or False?

TRUE
FALSE

49.

Which type of join is not desirable for retrieval?

Inner
Left
Right
Outer

50.

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

51.

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

52.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT AVG(Salary) from Salesemployee

where Dept = ' HR';

1067
500
2500
1064

53.

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

54.

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%' and Dept ='HR';

3
1
8
4

55.

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

56.

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 ;

200
500
700
100

57.

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;

58.

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

COUNT
UPPER
LOWER
All of the mentioned

59.

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

60.

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

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;

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 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 AVG(Salary) from Salesemployee
where Dept = ' HR';

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(Salary) from Salesemployee
where name Like 'S%' and Dept ='HR';

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%';

STRUCTURED QUERY LANGUAGE TEST

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

Which one is a non-relational database?

What is the full form of SQL?

What does a DML Stand for?

In SQL, which command is used to change a table's storage characteristics?

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

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

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?

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

Which one is not used in SQL?

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 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

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

Which SQL Query is used for updating the ContactName in 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;

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;

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

You can delete a view with _____________ Command.

Which of the SQL statement is correct?

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

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

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

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

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

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.

The SQL WHERE clause used for

Find the names of the countries whose condition is sunny

Find all the cities whose humidity is 89

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

What is "Subquery"?

Where subqueries can not be used?

Which of the following is true about sub-queries?

Which of the following statements are TRUE regarding subqueries?

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? A column with a Primary key has a Null value. True or False?

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

A ______ index is created based on only one table column.

How many Primary Keys can have in a table?

Where are Joins used?

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?

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

How many tables may include with a join?

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?

In which two cases would you use an outer join? (Choose two.)

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

Which type of join is not desirable for retrieval?

Choose the query that matches the above image.

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 AVG(Salary) from Salesemployee where Dept = ' HR';

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(Salary) from Salesemployee where name Like 'S%' and Dept ='HR';

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 MIN(Salary) from Salesemployee WHERE Employee_ID % 2 <> 0 ;

Which of the following is incorrect SQL?

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

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

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

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

SELECT emp_id, fname, lname

FROM person

ORDER BY emp_id;

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

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;

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;

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

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

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

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

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?

A column with a Primary key has a Null value.

True or False?

Can you validate the statement?

A table contains more than one foreign key

True or False?

Can you validate the statement?

Join is different from Inner join.

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?

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 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 AVG(Salary) from Salesemployee

where Dept = ' HR';

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(Salary) from Salesemployee

where name Like 'S%' and Dept ='HR';

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 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 Count(Salary) from Salesemployee

where name Like 'S%';

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