The hard drive will the original query take

Assignment Help Computer Engineering
Reference no: EM1328637

Here's a query:

SELECT orders.order_date, orders.customer_numb
FROM orders INNER JOIN order_lines ON orders.order_numb = order_lines.order_numb
WHERE order_lines.isbn = '0-131-4966-9';

and here it is rewritten using a subquery:

SELECT order_date, customer_numb
FROM orders
WHERE order_numb IN (SELECT order_numb
FROM order_lines
WHERE isbn = '0-131-4966-9')

Assume that the tables orders and order_lines each have 500,000 rows/tuples.

Assume (somewhat artificially) that RAM can hold 200 rows and devotes half of that to reading one table and half to reading the other table and has "other places" to store the subquery/query results.

(i) How many reads from the hard drive will the original query take?
(ii) How many reads from the hard drive would the rewritten query take?

Reference no: EM1328637

Pseudo code of the concurrent logical channel protocol

In the stop-and-wait protocol, argue that the sequence number (the bit) in the ack is not needed. I.e., we do need a bit in the frame (we argued this in class), but what if

Develop flip flop which is equivalent to the 74x74

Develop flip flop which is equivalent to the 74x74 positive-edge-triggered flip flop using a 74x109 positive-edge-triggered flip flop. No other component is to be used.

Write down an interactive web page named swap.html

Write an interactive Web page named swap.html that contains two text boxes and a button. When the user clicks the button, the contents of the two text boxes should be swappe

Create a program to compute numeric grades for a course

Write down a program to compute numeric grades for a course. The course records are in a file that will serve as the input file. The input file is in exactly the following f

What you have learned about fddi

Using Microsoft Word, write a two to three paragraph summary of what you have learned about FDDI. Include all of the URL addresses of the links that you used at the end of y

Develop an outline for a proposed project that would meet

As a result, your manager has given you the responsibility to develop an outline for a proposed project that would meet this upcoming need for arranging and conducting a two

What items you will be able to create

What items you will be able to create and how you will create them? Create storyboard and list of menu and screen items to delineate your proposed user screen(s) and menus.

Write a program that provides the user with a menu of choice

You are to write a program that provides the user with a menu of choices that have to do with performing operations on two-dimensional arrays. In particular, the menu should

Reviews

Write a Review

 
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd