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Data-flow diagrams can be used to model both the physical and logical systems. Data models can be analyzed to identify possible inconsistencies that exist between two sets of diagrams or within a single DFD. Redundant data flows, procedural redundancies, and inefficiencies can be identified by studying data-flow diagrams. We will be discussing this week under this topic the process modeling and logic modeling part of design. Although there are several methods and techniques available for process modeling, this week focuses on data-flow diagrams (DFDs). Data flow diagrams can be hard to develop and understand. In simple system design, data flow diagrams and process models may not be necessary. What do you think about not using data flow diagrams in some cases?
Data Normalization: What is the importance of data normalization in the reduction of insertion and deletion anomalies? Provide examples of insertion and deletion anomalies. - Explain why it is important to reduce insert and deletion anomalies.
Describe relationships with the example. Also illustrate degree of relationship for that example. Describe the different operations of relational algebra with suitable example each.
Webster Library wants to know how many green books it has. Out of the 500 shelves of books, 3 shelves were selected. These shelves hold 150 books each. 54 of the books sampled were green.
Create two (2) UML diagrams, one (1) showing a conceptual view and one (1) showing a process view of the architectures for each of the two (2) following systems (for a total of four [4] diagrams) through the use of Microsoft Visio
Construct an entity-relationship (ER) model for the database. Make sure you include in your model details of entities, relationships, attributes, keys and limits in participation.
What basic steps are required for analyzing data using Microsoft® Access®? How could these steps help you diagnose and troubleshoot Microsoft® Access® errors?
Draw the E/R diagrams for the business rules
prepare a 900 word paper discussing the attached case study burger king beefs up global operations and incorporating
imagine that you work for a police department and have need to track the following type of data parolees being released
In this lab, you will save user activity data in a database. A record of each user's IP address and the current date and time will be created whenever a user visits the Personnel form.
Write an SQL query to find out how many Computer Science departments are not in Victoria. Return the number - Discuss likely data integrity constraints on attributes and specify all candidate keys and the primary key for each relation based on the..
Assume that 30% of science students are majoring in biology. Would you consider to be novel with respect to rule? Describe. Calculate confidence and support of rule.
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