STRUCTURED QUERY LANGUAGE TEST

Progress

1.

Which of the following database cannot be dropped?

2.

 Which of the following is the original purpose of SQL?

3.

Which file type is used for database backup?

4.

Which one is not part of the Database backup file?

5.

The result of a SQL SELECT statement is a ______.

6.

Find all the cities whose humidity is 89

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?

8.

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

9.

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

10.

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

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

11.

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

12.

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;

13.

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

14.

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

15.

Which of the SQL statement is correct?

16.

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    

17.

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

18.

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

19.

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    

20.

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;

21.

Find the names of the countries whose condition is sunny

22.

 Syntax for create a  views is _______

23.

What is the meaning of the “HAVING” clause in MySQL?

24.

Select ________ dept_name from instructor; 

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

25.

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'

26.

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

27.

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

28.

What is the significance of the statement of the below query?

SELECT branch_name, COUNT (DISTINCT customer_name)     
FROM depositor, account           
WHERE depositor.account_number = account.account_number   
GROUP BY branch_id          

29.

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

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;

31.

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

32.

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

33.

What is "Subquery"?

34.

Which of the following multi-row operators can be used with a sub-query?

35.

Can you validate the statement?

A subquery can be used anywhere an expression is allowed.

True or False?

36.

By default, which key creates Clustered index?

37.

Does an Index help to speed up?

38.

Can you validate the statement?

A table contains more than one foreign key

True or False?

39.

Which of the following is correct DROP INDEX Command?

40.

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

41.

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

42.

What is the syntax for joining two tables? Pick Two

43.

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? 

44.

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

Which Join?

45.

Choose the correct query for the below scenario.

 

46.

What are the joins available in SQL?

47.

Can you validate the statement?

Join is different from Inner join.

True or False?

48.

How many tables may include with a join? 

49.

Where are Joins used?

50.

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

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 ;  

52.

What values does the count(*) function ignore?

53.

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

54.

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

 

55.

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';      
        

56.

Use below table (Salesemployee) and answer the following question
What is the output of following query ?
SELECT MAX(Salary) from Salesemployee 
WHERE Employee_ID % 2 = 0 ;  

 

57.

Which SQL keyword is used to retrieve a maximum value?

58.

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

 

59.

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

60.

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

 

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