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Suppose a database has the following tables;
CUSTOMER (CustomerSK, Name, Phone, EmailAddress)STOVE (SerialNumber, Type, Version, DateofManufacture)REGISTRATION (CustomerSK, SerialNumber, Date)STOVE_REPAIR (RepairInvoiceNumber, SerialNumber, Date, Description, Cost, CustomerSK)
Write down the SQL code to complete the following requests.
1. Illustrate all data in each of the four tables. Don't show foreign key columns.2. Write down the names and e-mail addresses for all customers who have had stove repair which cost more than $50.3. Write all versions of stoves that are of type "Maytag" and they have not spent any money on repairs.
Is software measurement equivalent to software metrics? What makes them different?
Consider following opinion shared by some people: database management systems and data-warehousing techniques are the greatest threat to individual privacy in modern times. What is your opinion?
Explain thoughts on database design process this far. You have learned about first three phases of process: defining mission statement and mission objectives, analyzing current database, and creating data structures.
What kind of databases and database servers does MySpace use? Why is database technology so important for a business such as MySpace?
Compute the functional dependencies which exist in following table. After determining the functional dependencies, transform this table to an equivalent collection of the tables which are in third normal form.
In talking about database security, some aspects to regard as are Data Integrity, Confidentiality, and Malicious Activity. Illustrate how does database security relate to data integrity?
Based on the schema write SQL statements and provide the equivalent relational algebra expressions - relational algebra expressions return and give the equivalent SQL statements.
The relations given below keep track of airline flight information:Flights(flno: integer, from: string, to: string, distance:integer, departs: time, arrives: time, price: real)Aircraft(aid: integer, aflame: string, cruisingrange: integer)
Indicate the changes (using the shorthand representation) that you would need to make to the original premiere products database desing to support the following requirements.
What is the order P of the B+-tree if B+-tree access structure on the key is constructed? What is the number of leaf-level blocks needed if blocks are approximately 69% full (round up for convenience)?
Prepare the example of table which is in first normal form but not in second normal form and example of a table which is in second normal form but not in third normal form.
Compare the two non-sequential file structure models. What advantages does the first one have over the second and what advantages does the second have over the first?
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