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Let R be decomposed into R1, R2, ..., Rn. Let F be a set of FDs on R
1. Define what it means for F to be preserved in the set of decomposed relations.
2. Describe a polynomial-time algorithm to test dependency-preservation.
3. Projecting the FDs stated over a set of attributes X onto a subset of attributes Y requires that we consider the closure of the FDs. Give an example where considering the closure is important in testing dependency-preservation; that is, considering just the given FDs gives incorrect results.
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In what ways have the companies discussed in the case benefited? Provide several examples.
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Class PRG/211 Using visual logic number 1 and 2 task must include a conditional step and some form of iteration. Task 1.Enter a number of items and calculating sales tax on a sale including a step offering a warranty for each item. 2. Figuring out..
In Section 12.4, we said that the cost-to-go function satisfies the statement
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using a computer, show that 7 is a primitive root mod 8745437489. Find a number alpha mod 8745437489 that is not a primitive root
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Implement the list methods retrieve and remove to use exceptions.
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