STRUCTURED QUERY LANGUAGE TEST

Progress

1.

The result of a SQL SELECT statement is a ______.

2.

Which of the following is not a database object?

3.

Which of the following database cannot be dropped?

4.

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

5.

Which file type is used for database backup?

6.

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    

7.

Find all the cities whose humidity is 89

8.

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

9.

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

10.

The SQL WHERE clause used for 

11.

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

12.

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

13.

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

14.

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;

15.

You can delete a view with _____________ Command.

16.

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

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

17.

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

18.

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;

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.

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?

21.

Select ________ dept_name from instructor; 

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

22.

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    

23.

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?

24.

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'

25.

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

26.

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''?

27.

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

28.

The HAVING clause does which of the following?

29.

Which one is not used in SQL?

30.

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

31.

Can you validate the statement?

An ORDER BY can be used in a subquery.

True or False?

32.

Which of the following statements are TRUE regarding subqueries?

33.

Where subqueries can not be used?

34.

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

35.

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

36.

Does an Index help to speed up?

37.

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

38.

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

39.

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

40.

Can you validate the statement?

A column with a Primary key has a Null value.

True or False?

41.

Can you validate the statement?

Alias is used in Joins.

True or False?

42.

Choose the correct query for the below scenario.

 

43.

Which type of join is not desirable for retrieval?

44.

Can you validate the statement?

Join is different from Inner join.

True or False?

45.

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

46.

What is the function of Full Outer Join in SQL?

47.

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

48.

What are the joins available in SQL?

49.

Below image depicts:

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 among the following belongs to an “aggregate function”?

52.

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 ;    

 

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.

The SQL Statement

SELECT ROUND(45.926, -1) FROM DUAL;

55.

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

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.

Which SQL keyword is used to retrieve the highest value? 

58.

Use below table (Salesemployee) and answer the following question
What is the output of following query ?
SELECT MAX(Salary) from Salesemployee 
WHERE Salary >=2500 and Dept = 'Sales' ;

 

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.

Which SQL keyword is used to retrieve a maximum value?

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