STRUCTURED QUERY LANGUAGE TEST

Progress

1.

The result of a SQL SELECT statement is a ______.

2.

SQL can be used to

3.

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

4.

Which is the subset of SQL command used to manipulate Database structures, including tables?

5.

To delete the database __________ Command is used

6.

Select ________ dept_name from instructor; 

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

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.

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    

9.

Find the names of the countries whose condition is sunny

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'

11.

Which of the SQL statement is correct?

12.

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

13.

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

14.

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

15.

Can you validate the statement?

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

True or False?

16.

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

17.

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;

18.

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''?

19.

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

20.

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?

21.

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

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

22.

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;

23.

The HAVING clause does which of the following?

24.

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

25.

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;  

26.

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;

27.

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

28.

You can delete a view with _____________ Command.

29.

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

30.

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

31.

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

32.

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

33.

Where subqueries can not be used?

34.

Which of the following is true about sub-queries?

35.

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

36.

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

37.

Which of the following is not a Key in SQL Server?

38.

Which of the following is correct DROP INDEX Command?

39.

By default, which key creates Clustered index?

40.

Can you validate the statement?

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

True or False?

41.

Which type of join is not desirable for retrieval?

42.

What is the function of Full Outer Join in SQL?

43.

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?

44.

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

Which Join?

45.

Can you validate the statement?

Join is different from Inner join.

True or False?

46.

Choose the query that matches the above image.

47.

Below image depicts:

48.

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

49.

Can you validate the statement?

Alias is used in Joins.

True or False?

50.

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? 

51.

Which SQL keyword is used to retrieve a maximum value?

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 Max(Salary) from Salesemployee 
WHERE Gender = 'Male';  

 

54.

Which of the following is incorrect SQL?

55.

The SQL Statement

SELECT ROUND(45.926, -1) FROM DUAL;

56.

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

57.

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

 

58.

Which SQL keyword is used to retrieve the highest value? 

59.

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

 

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 ;  

 

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