SQL | Structured Query Language Test

1.

Which of the following is a valid SQL type?

Character
Numeric
Float
All the above

2.

To delete the database __________ Command is used

Drop database_name
Drop database database_name
Delete database_name
Delete database database_name

3.

Which file type is used for database backup?

BAK
TXT
XML
XLSX

4.

Which of the following database cannot be dropped?

TEMPDB
Master
Msdb
All of the Mentioned

5.

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

6.

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

7.

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

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.

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.

10.

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

11.

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

12.

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 =

13.

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

14.

You can delete a view with _____________ Command.

DROP VIEW
DELETE VIEW
REMOVE VIEW
TRUNCATE VIEW

15.

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

CREATE
UPDATE
ALTER
SELECT

16.

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

ORDER BY
SORT
ORDER
SORT BY

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.

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.

Can you validate the statement?

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

True or False?

TRUE
FALSE

20.

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;

21.

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');

22.

Which one is not used in SQL?

Create Table
Create Index
Create Unique Index
Create Table Column

23.

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

24.

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

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

25.

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

26.

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);

27.

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%'

28.

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.

29.

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

30.

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.

31.

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

SELECT
WHERE
ORDER BY
GROUP BY

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.

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

TRUE
FALSE

34.

Can you validate the statement?

A subquery can be used anywhere an expression is allowed.

True or False?

TRUE
FALSE

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?

A table contains more than one foreign key

True or False?

TRUE
FALSE

37.

Does an Index help to speed up?

SELECT queries
WHERE clauses
Both A and B
UPDATE Query

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.

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

Implicit
Unique
single-column
Composite

40.

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

Order Number
Order Date
Order Location
Order Name

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.

Can you validate the statement?

Join is different from Inner join.

True or False?

TRUE
FALSE

43.

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.

44.

Below image depicts:

SELF JOIN
INNER JOIN
FULL OUTER JOIN
None of the above

45.

What are the joins available in SQL?

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

46.

Can you validate the statement?

Alias is used in Joins.

True or False?

TRUE
FALSE

47.

How many tables may include with a join?

0
1
2
More than 1

48.

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);

49.

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;

50.

Which type of join is not desirable for retrieval?

Inner
Left
Right
Outer

51.

The SQL Statement

SELECT ROUND(45.926, -1) FROM DUAL;

Is illegal
Prints Garbage
Prints 045.925
Prints 50

52.

Use below table (Salesemployee) and answer the following question

What is the output of following query ?

SELECT Count(Salary) from Salesemployee

where name Like 'T%';

3
5
1
4

53.

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

54.

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

55.

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

56.

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

57.

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

58.

Use below table (Salesemployee) and answer the following question

What is the output of the following query?

SELECT SUM(Salary) from Salesemployee

WHERE Gender = 'Male';

9400
4000
5400
2500

59.

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

60.

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

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 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 Count(Salary) from Salesemployee
where name Like 'T%';

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 Gender = 'Male';

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

STRUCTURED QUERY LANGUAGE TEST

Which of the following is a valid SQL type?

To delete the database __________ Command is used

Which file type is used for database backup?

Which of the following database cannot be dropped?

Which of the following is the original purpose of SQL?

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

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?

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

Which of the SQL statement is correct?

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

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

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;

You can delete a view with _____________ Command.

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

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

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

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? "ORDER BY" can only be used by WHERE Clause. True or False?

Find all the cities whose humidity is 89

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

Which one is not used in SQL?

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 “ORDER BY” clause in MySQL?

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

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?

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 two options which do not belong to the Purpose of Delete

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

The HAVING clause does which of the following?

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

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

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

Can you validate the statement? A subquery can be used anywhere an expression is allowed. True or False?

Which of the following statements are TRUE regarding subqueries?

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

Does an Index help to speed up?

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

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

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

Where are Joins used?

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

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

Below image depicts:

What are the joins available in SQL?

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

How many tables may include with a join?

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?

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

Which type of join is not desirable for retrieval?

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(Salary) from Salesemployee where name Like 'T%';

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 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 Gender = 'Male';

Which of the following do you need to consider when you make a table 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 ;

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

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 Count(*) from Salesemployee WHERE Salary >=500 and Dept = 'Sales';

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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?

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

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

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;

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?

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

True or False?

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

What is the significance of the statement “GROUP BY d.name” in the following MySQL statement?

SELECT d.name, COUNT (emp_id) emp_no

FROM department d INNER JOIN Employee e

ON d.dept_id=e.emp_id

GROUP BY d.name

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

Can you validate the statement?

A subquery can be used anywhere an expression is allowed.

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?

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?

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(Salary) from Salesemployee

where name Like 'T%';

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 Gender = 'Male';

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 the following query?

SELECT SUM(Salary) from Salesemployee

WHERE Gender = 'Male';

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 Count(*) from Salesemployee

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

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