{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

BuslerLAB2 - Date_sold Commission_percent Discount_amt...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
IST 210 Lab #2 Chelsea Busler 6/16/11 Exercise 1: Step 1 -- Three reasons why we normalize databases is to eliminate redundant data, ensure that data dependencies make sense, and reduce the space that the database consumes by logically organizing the data. Step 2 -- 1NF Table Name: ITEM Column Name Item_Num Item_Desc Quantity Price Key Type Primary Key Sample Data 6531 7890 7956 3456 4234 7956 Tape Table Pens Stove Paper Pens 5 1 1 1 15 10 $100 $400 $2 $300 $234 $20 Step 3 -- 2NF Table Name: ITEM Column Name Item_Num Item_Desc Quantity Price Key Type Primary Key Step 4 -- 3NF Table Name: Item_Price Column Name Item_Desc Price Key Type Primary Key Exercise 2: Step 1: 1NF (Car_num, Salesman
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: , Date_sold, Commission_percent, Discount_amt) Partial Dependencies: (Car_num Date_sold) (Salesman Commission_percent) Transitive Dependencies: (Date_sold Discount_amt) Step 2: CAR_SALE is not in 2NF or 3NF because there are partial and transitive dependencies present. These can lead to redundancy in the database. Step 3: Table Name: CAR Column Name Car_Num Date_Sold Key Type Primary Table Name: SALESMAN Column Name Salesman Commission_percent Key Type Primary Key Table Name: DATE_SOLD Column Name Date_Sold Discount_Amt Key Type Primary Key...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern