STRUCTURED QUERY LANGUAGE TEST

Progress

1.

SQL can be used to

2.

 What does a  DML Stand for?

3.

To delete the database __________ Command is used

4.

What is the main language of  Transact-SQL?

5.

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

6.

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          

7.

Select ________ dept_name from instructor; 

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

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.

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

10.

Can you validate the statement?

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

True or False?

11.

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?

12.

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;

13.

 Syntax for create a  views is _______

14.

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

15.

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

16.

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

17.

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?

18.

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;

19.

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

20.

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

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

21.

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

22.

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

23.

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

24.

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

25.

The HAVING clause does which of the following?

26.

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

27.

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

28.

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

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

29.

Find the names of the countries whose condition is sunny

30.

The SQL WHERE clause used for 

31.

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

32.

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

33.

What is "Subquery"?

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 key accepts multiple NULL values?

37.

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

38.

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

39.

Which of the following is correct DROP INDEX Command?

40.

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

41.

Which type of join is not desirable for retrieval?

42.

Choose the query that matches the above image.

43.

Can you validate the statement?

Join is different from Inner join.

True or False?

44.

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

45.

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

46.

Choose the correct query for the below scenario.

 

47.

Below image depicts:

48.

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

 

49.

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?

50.

Where are Joins used?

51.

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';      
        

52.

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

53.

Which SQL keyword is used to retrieve the highest value? 

54.

Which of the following is incorrect SQL?

55.

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

 

56.

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';

 

57.

Which SQL keyword is used to retrieve a maximum value?

58.

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

59.

The _____ aggregation operation adds up all the values of the attribute

60.

What values does the count(*) function ignore?

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