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There are many kinds of entity relationships in a database model. The relationships can be classified by the following things.
Cardinality: maximum and minimum
Degree: binary, ternary, degree 4, and so forth
Entity type: strong, weak, ID-dependent, and supertype/subtype
What are these different types of classifications?
Do they overlap, or do they each tell us something unique about the entity relationship?
Why is it important to classify each of these types in an ERD (entity relationship diagram) model?
You may need to rerun the schema, especially when you have been experimenting with your solutions and may have corrupted the database unintentionally. If you suspect that there might be such problems, rerun the schema.
Display total number of employees for each salary within each job title. Columns should include Job Title, Salary, and 'Total Employees'.
The data in the table on the data sheet contains the operational expenditure and the budget for a small department.
You are interested in examining some hard-to-obtain data from two separate databases. Each database comprises numerical values - so there are 2n values total
predetermined overhead rate under the traditional costing system is closest and the activity-based costing system
a prestigious university has recently implemented a consolidation strategy that will require it to centralize their
1) Fetch all the customers that are not from region 'BC' or 'SP' 2) Show all customer contact names and titles for the business owners who are from Germany or France 3) Fetch customers from Germany, Mexico and Sweden
To what kind of list would you change it? What would you require to change about content in order for new list type to be effective for purpose of list?
How many sorted subfiles will there be after the initial pass of the sort, and how long will each subfile be?
Research the type of backup strategy that your organization has for their data systems. Summarize your findings. Do you agree with the strategy that your organization is using. Why or why not
Suppose that a certain program takes 500 seconds of elapsed time to execute. Out of these 500 seconds, 280 seconds is the CPU time and the rest is I/O time. What will be the I/O time?
The database application project (DAP) for this course consists of the creation of a fully functional Microsoft Access database application for a real client.
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