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1. How can you find the minimal key of relational schema? 2. What do you understand by dependency preservation?
List all salesperson numbers, salesperson names, and their salaries - List the addresses, balances, and invoice numbers of those customers who were sold merchandises in the database
Question 1: Use an example to explain what is an entity in a process? What is an attribute? Question 2: Define a measure that can be used to judge a code's quality. Name one situation you could use this measure. Question 3: Name the situation one has..
Write a paper discussing what professional organizations you might join, and websites you might visit, that would provide insight into a career that includes responsibility for database administration
What time does it take to find the resulting tuples of the given query: "List the names of all students who are taking a class in the Turing Auditorium".
What model would you use for this estimation? How accurate would it be and how would you obtain the estimate?
Write a join query that for every order placed on September 5, 1998, (use '05-SEP-1998') will list the order number and order date along with the customer number, last name, and first name of the customer who placed the order
relational algebragiven the following set of relations from the east coast aquarium database list the sequence of
Create an ERD for this video store case. Turn in an ERD with appropriate relationship sentences. You can use drawing tools in MS Word or MS Visio to create your ERD. Make sure your relationship sentences are consistent with your relationship in yo..
Given the following table, identify the functional dependencies: In the table provided below, fill in the following data such that it is completely un-normalized. That is, it is not even in 1NF
Making a simple XML tree out of the given data and using Xpath to navigate through it
Entity relationship model is in wide use as a design tool for relational databases. Why do you think designers have chosen this model, and what makes it an effective design tool?
What is the term for the number used to reference an array element? The number of elements in an array is called the ______ of the array. Arrays are most efficiently processed using ______
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