SQL | Structured Query Language Test

1.

What is the meaning of a Database?

Collection of structured information
Database stores SQL Query
Database is a kind of view table
None of the above

2.

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;

3.

What does a DML Stand for?

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

4.

Which of the following is the original purpose of SQL?

To specify the syntax and semantics of SQL data definition language
To specify the syntax and semantics of SQL manipulation language
To define the data structures
All of the above

5.

Which one is a non-relational database?

Postgre
MySQL
MariaDB
MongoDB

6.

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.

7.

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

8.

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

9.

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

10.

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

11.

Select ________ dept_name from instructor;

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

All
From
Distinct
Name

12.

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

13.

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

14.

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

15.

You can delete a view with _____________ Command.

DROP VIEW
DELETE VIEW
REMOVE VIEW
TRUNCATE VIEW

16.

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

17.

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;

18.

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

19.

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

20.

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

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.

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;

23.

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

24.

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

ORDER BY
SORT
ORDER
SORT BY

25.

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.

26.

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;

27.

Which one is not used in SQL?

Create Table
Create Index
Create Unique Index
Create Table Column

28.

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

29.

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

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

30.

Can you validate the statement?

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

True or False?

TRUE
FALSE

31.

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

TRUE
FALSE

32.

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

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.

A Key which is a set of one or more columns that can identify a record uniquely is called?

Natural key
Primary key
Not Null key
Alternate key

37.

Student (ID, Name, Dept_name, Total_credit)

In this above query which attribute form the Primary Key?

Name
Dept
Total_Credit
ID

38.

Which of the following do you need to consider when you make a table in SQL?

Data types
Primary keys
Default values
All of the above

39.

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

Order Number
Order Date
Order Location
Order Name

40.

How many Primary Keys can have in a table?

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

41.

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

42.

Which type of join is not desirable for retrieval?

Inner
Left
Right
Outer

43.

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;

44.

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.

45.

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;

46.

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

Inner
Cartesian
Outer
Left

47.

How many tables may include with a join?

0
1
2
More than 1

48.

What are the joins available in SQL?

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

49.

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

Which Join?

Inner
Cartesian
Outer
Left

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 AVG(Salary) from Salesemployee

where Dept = ' HR';

1067
500
2500
1064

52.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT SUM(Salary) from Salesemployee ;

5000
2500
4500
9400

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 'S%' and Dept ='HR';

3
1
8
4

54.

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

Aggregate function
Adjunct function
Set Operation
Scalar Operation

55.

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

56.

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

57.

Which SQL keyword is used to retrieve a maximum value?

MOST
TOP
MAX
UPPER

58.

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

59.

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

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

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

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

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 SUM(Salary) from Salesemployee
where Name = 'Tom';

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 COUNT(*) from Salesemployee
WHERE Employee_ID % 2 <> 0 ;

STRUCTURED QUERY LANGUAGE TEST

What is the meaning of a Database?

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

What does a DML Stand for?

Which of the following is the original purpose of SQL?

Which one is a non-relational database?

The HAVING clause does which of the following?

Syntax for create a views is _______

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

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

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

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

You can delete a view with _____________ Command.

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

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

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

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?

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

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

Find all the cities whose humidity is 89

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

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

The SQL WHERE clause used for

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

Which one is not used in SQL?

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 meaning of the “ORDER BY” clause in MySQL?

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

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

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

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?

A Key which is a set of one or more columns that can identify a record uniquely is called?

Student (ID, Name, Dept_name, Total_credit) In this above query which attribute form the Primary Key?

Which of the following do you need to consider when you make a table in SQL?

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

How many Primary Keys can have in a table?

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?

Which type of join is not desirable for retrieval?

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

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

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

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

How many tables may include with a join?

What are the joins available in SQL?

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

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

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

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';

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

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

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 a maximum 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%';

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 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'

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

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

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 “ORDER BY” in the following MySQL statement?

SELECT emp_id, fname, lname

FROM person

ORDER BY emp_id;

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'

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?

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

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?

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

True or False?

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

Student (ID, Name, Dept_name, Total_credit)

In this above query which attribute form the Primary Key?

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?

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 SUM(Salary) from Salesemployee ;

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 AVG(Salary) from Salesemployee

WHERE Gender = 'Female';

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 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 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'