STRUCTURED QUERY LANGUAGE TEST

Progress

1.

 What does a  DML Stand for?

2.

Which of the following is a valid SQL type?

3.

Which file type is used for database backup?

4.

SQL can be used to

5.

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

6.

The HAVING clause does which of the following?

7.

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

8.

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

9.

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

10.

Select ________ dept_name from instructor; 

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

11.

Which one is not used in SQL?

12.

 Syntax for create a  views is _______

13.

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''?

14.

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    

15.

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          

16.

You can delete a view with _____________ Command.

17.

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'

18.

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

19.

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

SELECT emp_id, fname, lname  
FROM person    
ORDER BY emp_id;  

20.

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;  

21.

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

22.

Find the names of the countries whose condition is sunny

23.

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?

24.

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

25.

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?

26.

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

27.

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    

28.

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

29.

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

30.

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;

31.

What is "Subquery"?

32.

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

33.

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

34.

Where subqueries can not be used?

35.

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

36.

Student (ID, Name, Dept_name, Total_credit)

In this above query which attribute form the Primary Key?

37.

How many types of indexes are there in the SQL server?

38.

Can you validate the statement?

We can use the index on columns that contain a high number of NULL values.

True or False?

39.

Which of the following is correct DROP INDEX Command?

40.

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

41.

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

42.

Choose the query that matches the above image.

43.

Can you validate the statement?

Alias is used in Joins.

True or False?

44.

How many tables may include with a join? 

45.

Below image depicts:

46.

What are the joins available in SQL?

47.

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

48.

Where are Joins used?

49.

Can you validate the statement?

Join is different from Inner join.

True or False?

50.

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

51.

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 ;  

 

52.

What values does the count(*) function ignore?

53.

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

 

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 ;    

 

55.

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';

 

56.

Which of the following set of operations is a valid set of Aggregate operations in SQL?

57.

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

58.

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

 

59.

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

 

60.

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

 

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