STRUCTURED QUERY LANGUAGE TEST

Progress

1.

What is the main language of  Transact-SQL?

2.

SQL can be used to

3.

What is the full form of SQL?

4.

The result of a SQL SELECT statement is a ______.

5.

Which of the following is a valid SQL type?

6.

 Syntax for create a  views is _______

7.

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''?

8.

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;

9.

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

10.

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;

11.

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          

12.

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;

13.

Find the names of the countries whose condition is sunny

14.

Find all the cities whose humidity is 89

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.

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

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

18.

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

19.

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

20.

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

21.

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    

22.

The SQL WHERE clause used for 

23.

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

24.

Which one is not used in SQL?

25.

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

26.

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

27.

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?

28.

You can delete a view with _____________ Command.

29.

Select ________ dept_name from instructor; 

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

30.

Which of the SQL statement is correct?

31.

A subquery in an SQL SELECT statement is enclosed in

32.

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

33.

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

34.

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

35.

Can you validate the statement?

A subquery can be used anywhere an expression is allowed.

True or False?

36.

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

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.

A ______ index is created based on only one table column.

39.

Student (ID, Name, Dept_name, Total_credit)

In this above query which attribute form the Primary Key?

40.

Can you validate the statement?

A column with a Unique key has duplicate values.

True or False?

41.

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

42.

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

43.

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

Which Join?

44.

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? 

45.

What are the joins available in SQL?

46.

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

47.

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

48.

Which type of join is not desirable for retrieval?

49.

Can you validate the statement?

Alias is used in Joins.

True or False?

50.

What is the function of Full Outer Join in SQL?

51.

Which SQL keyword is used to retrieve the highest value? 

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(*) from Salesemployee 
WHERE Salary >=500 and Dept = 'Sales';

 

54.

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 = 'Marketing';

 

55.

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

 

56.

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

 

57.

What values does the count(*) function ignore?

58.

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

 

59.

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';      
        

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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