Explain the distinction between a type x and reference type

Assignment Help Computer Engineering

Reference no: EM131876537

Problem

1. Explain the distinction between a type x and a reference type ref(x). Under what circumstances would you choose to use a reference type?

2. Consider the E-R diagram in Figure 2.11, which contains composite, multivalued and derived attributes.

a. Give an SQL:1999 schema definition corresponding to the E-R diagram. Use an array to represent the multivalued attribute, and appropriate SQL:1999 constructs to represent the other attribute types.

b. Give constructors for each of the structured types defined above.

Reference no: EM131876537

Questions Cloud

Do you believe ticketmaster and live nation have violated : A New York-based online concert-ticket seller, Songkick, has helped major artists sell passes directly to fans so as to avoid scalpers.

Generate a flow diagram for the process : Generate a flow diagram for the process as it is, label the parts, and identify whether any bottlenecks exist in the process.

Determine which location would produce the greater profit : Locate near the major raw materials or locate near the major customers. Locating near the raw materials will result in lower fixed and variable costs.

How do you remove only the hidden files of your directory : How do you remove only the hidden files of your directory? Does rm * remove these files as well?

Explain the distinction between a type x and reference type : Explain the distinction between a type x and a reference type ref(x). Under what circumstances would you choose to use a reference type?

What is the research model or framework : In "Guiso and etc. 2006, Does Culture Affect Economic Outcomes?", what is the research model or framework presented by the authors? Specifically.

How will you make the file executable : You created a shell script with vi. How will you make the file executable and then execute the script without leaving the editor?

Determine the production and inventory plan : Han Solo projects the firm's aggragate requirements over the next three months to be : 100,200, and 200 units of their flagship products.

Did the two buddies commit the torts of assault : Guy is a former employee at the Joe's used car dealership. Guy enters the dealership and demands Joe's to pay him $1000 in back wages that he‘s owed.

User Account

All Pages