SQL | Structured Query Language Test

1.

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

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.

Which of the following is not a database object?

Stored Procedure
Index
Database Diagram
Powershell

4.

Which of the following is a valid SQL type?

Character
Numeric
Float
All the above

5.

To Create a new database __________ Command is used

New database_name
Create database database_name
First Database database_name
New database database_name

6.

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.

7.

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');

8.

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

9.

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%'

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.

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

12.

You can delete a view with _____________ Command.

DROP VIEW
DELETE VIEW
REMOVE VIEW
TRUNCATE VIEW

13.

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

14.

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

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

15.

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

CREATE
UPDATE
ALTER
SELECT

16.

Select ________ dept_name from instructor;

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

All
From
Distinct
Name

17.

Identify the average salary of the jobs 'MANAGER' and 'ANALYST'. Display job, average salary if the identified average salary is more than 1500.

select job, avg(sal) "Average Salary" from emp where job in('MANAGER','ANALYST') group by job having avg(sal)>=1500;
select job, avg(sal) "Average Salary" from emp where job in('MANAGER','ANALYST') group by job having avg(sal)>1500;
select job, avg(sal) "Average Salary" from emp where job in('MANAGER') group by job having avg(sal)>1500;
select job, sum(sal) "Average Salary" from emp where job in('MANAGER','ANALYST') order by job having avg(sal)>1500;

18.

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

19.

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

20.

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.

21.

Can you validate the statement?

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

True or False?

TRUE
FALSE

22.

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;

23.

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

ORDER BY
SORT
ORDER
SORT BY

24.

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

25.

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);

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.

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

28.

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

29.

Which one is not used in SQL?

Create Table
Create Index
Create Unique Index
Create Table Column

30.

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

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.

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

SELECT
WHERE
ORDER BY
GROUP BY

33.

A subquery in an SQL SELECT statement is enclosed in

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

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 operators cannot be used in a sub-query?

AND, OR
< , > >, <>

36.

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;

37.

Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?

Candidate Key
Sub Key
Super Key
Foreign Key

38.

How many Primary Keys can have in a table?

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

39.

By default, which key creates Clustered index?

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

40.

Does an Index help to speed up?

SELECT queries
WHERE clauses
Both A and B
UPDATE Query

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.

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.

Can you validate the statement?

Join is different from Inner join.

True or False?

TRUE
FALSE

44.

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

45.

Which type of join is not desirable for retrieval?

Inner
Left
Right
Outer

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.

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;

49.

How many tables may include with a join?

0
1
2
More than 1

50.

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;

51.

Which SQL keyword is used to retrieve a maximum value?

MOST
TOP
MAX
UPPER

52.

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

53.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Count(*) from Salesemployee

WHERE Salary >=500 and Dept = 'Sales';

8
6
3
4

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.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Count(*) from Salesemployee

WHERE Gender = 'Male';

8
4
5
3

57.

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

58.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Count(*) from Salesemployee

WHERE Salary >=500 and Dept = 'Marketing';

8
6
1
4

59.

What values does the count(*) function ignore?

Repetitive values
Null values
Characters
Integers

60.

Which SQL keyword is used to retrieve the highest value?

MOST
TOP
MAX
UPPER

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

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 Gender = 'Female';

Use below table (Salesemployee) and answer the following question
What is the output of following query ?
SELECT Count(*) from Salesemployee
WHERE Salary >=500 and Dept = 'Sales';

STRUCTURED QUERY LANGUAGE TEST

Which of the following is the original purpose of SQL?

SQL can be used to

Which of the following is not a database object?

Which of the following is a valid SQL type?

To Create a new database __________ Command is used

The SQL WHERE clause used for

Find the names of the countries whose condition is sunny

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

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''?

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

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

You can delete a view with _____________ Command.

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

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

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

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

Identify the average salary of the jobs 'MANAGER' and 'ANALYST'. Display job, average salary if the identified average salary is more than 1500.

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;

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

The HAVING clause does which of the following?

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

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

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

Syntax for create a views is _______

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

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

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

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

Which one is not used in SQL?

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;

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

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

A subquery in an SQL SELECT statement is enclosed in

Which of the following is true about sub-queries?

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

Which of the following is correct DROP INDEX Command?

Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?

How many Primary Keys can have in a table?

By default, which key creates Clustered index?

Does an Index help to speed up?

Where are Joins used?

What is the function of Full Outer Join in SQL?

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

What is the syntax for joining two tables? Pick Two

Which type of join is not desirable for retrieval?

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.)

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

How many tables may include with a join?

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

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 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 Salary >=500 and Dept = 'Sales';

Which of the following is incorrect SQL?

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 Count(*) from Salesemployee WHERE Gender = 'Male';

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 Salary >=500 and Dept = 'Marketing';

What values does the count(*) function ignore?

Which SQL keyword is used to retrieve the highest value?

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

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

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

select deptName

from Employee

having avg (salary)

group by deptName

where sex = 'M'

What is the significance of 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

Select ________ dept_name from instructor;

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

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;

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

Can you validate the statement?

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

True or False?

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;

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?

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 Salary >=500 and Dept = 'Sales';

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 Count(*) from Salesemployee

WHERE Gender = 'Male';

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 Salary >=500 and Dept = 'Marketing';

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