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Database Design & Management

Exam #1 Review. Database Design & Management. Need to Know. Major topics Keys Relations Functional dependency Normalization Subtypes and Supertypes Weak and Strong entities E-R modeling using Crow’s Foot notation Database design Cover chapters 1, 2, 4 and 5. Practice.

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Database Design & Management

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  1. Exam #1 Review Database Design & Management

  2. Need to Know • Major topics • Keys • Relations • Functional dependency • Normalization • Subtypes and Supertypes • Weak and Strong entities • E-R modeling using Crow’s Foot notation • Database design • Cover chapters 1, 2, 4 and 5

  3. Practice • Individually, do the following • For each of the following exercises, use EMPLOYEE as one of your entities • 1) Create and diagram a 1-1 relationship • 2) Create and diagram a 1 to many relationship • 3) Create and diagram a many to many relationship

  4. Practice Given the following relation, identify any candidate keys Cars(type, color, numberOfDoors, manufacturedBy, VIN, countryOfOrigin ) Given the following relation, identify all functional dependencies Artwork(artistName, titleOfArtwork, typeOfArt, whereCreated, artistCompleteAddress, artistEmail, artworkID, suggestedRetailCost, artistID) Then normalize the Artwork relation

  5. Practice Normalize this table Project ( Project_Number, Proj_Desc, Proj_Duration, Requesting_Dept, Dept_Phone_Number)

  6. Practice • Individually • Use the entity Person • 1) Create a diagram using exclusive subtypes with a discriminator • Be sure and include the discriminator in your diagram • Include 2 exclusive subtypes • 2) Create a diagram using inclusive subtypes • Include 4 inclusive subtypes

  7. Practice • Individually • Your are given the following entities • PROJECT • DEPARTMENT • ASSIGNMENT • Using your knowledge of how projects work, create an E-R diagram with the above 3 entities • List any assumptions you make • Include identifiers • Cardinalities • Basic attributes

  8. Practice • Consider the traffic violation shown on the next slide • The rounded corners on this form provide graphical hints about the boundaries of the entities represented • Create a data model with 5 entities • Specify identifiers for each • Specify attributes for each • Include data type • Null status • State the type of relationship between entities • Include cardinalities

  9. Exam 1, February 24th • Exam #1 • If you do not attend class, I will place a make-up exam in the test center by 9:30 Tuesday morning • NOTE: I will subtract 20 points from your test score (one letter grade) • This is your responsibility! I will not send emails or phone you or visit your favorite haunts to let you know that you need to take the exam… • You will have until 12:00 p.m. (noon) on Wednesday, January 26th to complete the exam in the test center • I will pick up any completed exams at noon on Wednesday so the exam can be graded by the beginning of class on Wednesday • If you do not complete the exam, you will earn 0 points for this exam score

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