Question: Explain why the two following commands produce different results. SELECT DISTINCT COUNT (V_CODE) FROM PRODUCT; SELECT COUNT (DISTINCT V_CODE) FROM PRODUCT;

Explain why the two following commands produce different results.
SELECT DISTINCT COUNT (V_CODE) FROM PRODUCT;
SELECT COUNT (DISTINCT V_CODE) FROM PRODUCT;

Step by Step Solution

★★★★★

3.31 Rating (166 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

The difference is in the order of operations The first command executes the Count function ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

358-CS-DB (657).docx

120 KBs Word File

Students Have Also Explored These Related Databases Questions!

Explain why the two arene oxides in Problem 23a open in opposite directions.

Why might two different investors select two different potential investments if one investment had the highest return and the highest risk over the other investment?

Explain how the SELECT and WHERE commands help a user to view the necessary data from multiple database files (tables).

Could you help me with Database Management Systems & Theory a. What restrictions apply to the use of the aggregate functions within the SELECT statement? How do nulls affect the aggregate functions?...

1. Discuss, with examples, what are referential constraint actions? 2. Explain why it might be more appropriate to declare an attribute that contains only digits as a character data type instead of a...

Explain why the two following commands produce different results. SELECT DISTINCT COUNT (V_CODE) FROM PRODUCT; SELECT COUNT (DISTINCT V_CODE) FROM PRODUCT;

What restrictions apply to the use of the aggregate functions within the SELECT statement? How do nulls affect the aggregate functions? What is the difference between a subquery and a join? Under...

Please answer 1,2,7,8,9 in detail In a SELECT query, what is the difference between a WHERE clause and a HAVING clause? 2. Explain why the following command would create an error and what changes...

Database systems chapter 7 review questions. Number nine explain the following to come to commands produce different results: SELECT DISTINCT COUNT ( V _ CODE ) FROM PRODUCT; SELECT COUNT ( DISTINCT...

Question 2 Which of the following series converges? QUESTION 2 Which of the following series converges? +. +1+3+9+27+... C2+4 +8 + 16 +.. 9+8+7+ 6 + ..

A source emits 12.0 J of light of wavelength 620 nm and 8.0 J of light of wavelength 580 nm per second. The relative luminosity at 620 nm is 35% and that at 580 nm is 80%. Find (a) the total radiant...

Stock options _ _ _ _ _ _ . ( Check all that apply. ) Multiple select question. are often given to employees as part of their compensation are a corporation's option to issue both preferred and...

4. Sarah is planning to measure the change in mass during a reaction. a. What piece of equipment does she need to do this? b. Here are Sarahs instructions but they are in the wrong order. Arrange...

What is the difference between partial completeness and total completeness?

According to the data model, is it required that every entity instance in the PRODUCT table be associated with an entity instance in the CD table? Why or why not?

What is an entity cluster, and what advantages are derived from its use?

You are a manager at North Fare, which is considering expanding its operations in synthetic fibre manufacturing Your boss comes into your office drops a constant report on your desk and complains "We...

I need Correct Answer Don't copy Paste (a) Let F:RR be a function defined as F(x)=2x.F is 11. (b) Let G:NN be a function defined as G(n)=2n2+1. G is not 11

5.1 Q2 A. You need a simple interest bridge loan to cover the costs of buying a new home while waiting to close on your old one. You need to finance $61,000 and bank will charge 3.5%. How much...