STRUCTURED QUERY LANGUAGE TEST

Progress

1.

Which of the following database cannot be dropped?

2.

What is the full form of SQL?

3.

Which of the following is not a database object?

4.

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

5.

To delete the database __________ Command is used

6.

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

7.

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

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

8.

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;

9.

The HAVING clause does which of the following?

10.

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    

11.

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

12.

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?

13.

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

14.

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    

15.

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

16.

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'

17.

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

18.

 Syntax for create a  views is _______

19.

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;  

20.

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

21.

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

22.

Can you validate the statement?

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

True or False?

23.

Find the names of the countries whose condition is sunny

24.

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

25.

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

26.

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

27.

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

28.

The SQL WHERE clause used for 

29.

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;

30.

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;

31.

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

32.

Where subqueries can not be used?

33.

Which of the following is true about sub-queries?

34.

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

35.

Can you validate the statement?

A subquery can be used anywhere an expression is allowed.

True or False?

36.

Can you validate the statement?

A column with a Unique key has duplicate values.

True or False?

37.

Can you validate the statement?

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

True or False?

38.

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

39.

How many Primary Keys can have in a table?

40.

Which of the following is correct DROP INDEX Command?

41.

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

42.

Which type of join is not desirable for retrieval?

43.

What is the function of Full Outer Join in SQL?

44.

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

45.

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

 

46.

What is the syntax for joining two tables? Pick Two

47.

Choose the query that matches the above image.

48.

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

Which Join?

49.

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? 

50.

Can you validate the statement?

Alias is used in Joins.

True or False?

51.

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

52.

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

 

53.

What values does the count(*) function ignore?

54.

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%';

 

55.

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

 

56.

The SQL Statement

SELECT ROUND(45.926, -1) FROM DUAL;

57.

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

 

58.

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';

 

59.

Which SQL keyword is used to retrieve the highest value? 

60.

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 ;    

 

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