STRUCTURED QUERY LANGUAGE TEST

Progress

1.

What is the meaning of a Database?

2.

Which of the following is a valid SQL type?

3.

To delete the database __________ Command is used

4.

In SQL, which command is used to change a table's storage characteristics?

5.

Which of the following database cannot be dropped?

6.

The HAVING clause does which of the following?

7.

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'

8.

You can delete a view with _____________ Command.

9.

Find all the cities whose humidity is 89

10.

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

11.

Which of the SQL statement is correct?

12.

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

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;

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.

 Syntax for create a  views is _______

16.

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          

17.

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

18.

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

19.

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

20.

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

21.

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;

22.

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

23.

Can you validate the statement?

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

True or False?

24.

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?

25.

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''?

26.

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

27.

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

28.

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;  

29.

Find the names of the countries whose condition is sunny

30.

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

31.

Can you validate the statement?

A subquery can be used anywhere an expression is allowed.

True or False?

32.

Which of the following is true about sub-queries?

33.

Which of the following statements are TRUE regarding subqueries?

34.

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

35.

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

36.

By default, which key creates Clustered index?

37.

Which key accepts multiple NULL values?

38.

Can you validate the statement?

A column with a Primary key has a Null value.

True or False?

39.

Does an Index help to speed up?

40.

Can you validate the statement?

A column with a Unique key has duplicate values.

True or False?

41.

What are the joins available in SQL?

42.

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? 

43.

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

44.

Choose the query that matches the above image.

45.

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

Which Join?

46.

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

47.

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

 

48.

Which type of join is not desirable for retrieval?

49.

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

50.

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?

51.

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

 

52.

The SQL Statement

SELECT ROUND(45.926, -1) FROM DUAL;

53.

Use below table (Salesemployee) and answer the following question
What is the output of following query ?
SELECT Count(Salary) from Salesemployee 
where name Like 'S%';

 

54.

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

 

55.

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 ;  

 

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.

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 MIN(Salary) from Salesemployee 
WHERE Gender = 'Female';  

 

59.

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 ;  

60.

“COUNT” keyword belongs to which categories in MySQL?

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