What single relational algebra operation should be used

Assignment Help Database Management System

Reference no: EM132103214

The preceding query was prepared by Mr. R.T.R.N. Reindeer, whose nose should now be even redder because he forgot to include any provision for attaching name and address data to the orders!

This could make for a very confusing evening for his boss, to say the least.

Your analysis shows that it would be more economical to handle this as follows: each site should send its order and name/address data to the North Pole separately, with the actual join being done there, since each child typically gets several orders filled.

To economize, it is decided to only send to the North Pole the name/address data for children who qualify for orders - i.e. if a given site serves 50,000 children but only 45,000 have been sufficiently good, then only these 45,000 name/address tuples should be sent north.

What SINGLE relational algebra operation should be used at each local site to extract the relevant tuples from the complete Child table?

Assume the result of the orders query is called QualifyingOrder.

Reference no: EM132103214

Questions Cloud

Estimate the period of oscillation : How should they proceed? You can answer this by studying the behavior of the system for varying initial conditions.

Explain the solicitors for gorgeous gardens : BUSINESS LAW 1018 - Legal Analysis Report - Advise Tom and James whether or not they are entitled to remove (a) the shop counter and (b) the tool shed

Prepare a business report comparing the three vendors : A list of the antivirus and firewall packages you researched. You should research and list at least three different antivirus and firewall packages.

Ask the user for the amount of lines they want : Create a project submission folder, in the form Lab#FirstNameLastName. For example, mine would be Lab5DavidLiu

What single relational algebra operation should be used : What SINGLE relational algebra operation should be used at each local site to extract the relevant tuples from the complete Child table?

Formulate the optimisation problem : Formulate the optimisation problem to minimise the fitting error - Generate the 3D points using a given cylinder; you can choose any N, centre position

How might your company combat these challenges : How might your company combat these challenges? Support your answers with references from the text or course articles.

Write a simple x86 assembly program that set up instruction : Pretend that XOR instruction can't be used, write a simple x86 assembly program that set up some instructions to replace XOR of two bits

What are two other advantages of ipv6 over ipv4 : What was the primary motivating factor to migratefrom IPv4 to IPv6? What are two other advantages of IPv6 over IPv4? Why

User Account

All Pages