When we query (either join or subquery), sometimes we have to use the same set of...
When we query (either join or subquery), sometimes we have to use the same set of data over and over again. How do we improve our performance so that we don't have to load the same set of data from disk over and over again for the same query or similar queries that happen consecutively?
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When we query (either join or subquery), sometimes we have to
use the same set of...
4. As we have seen, sometimes two sets can have the same cardinality even when one...
4. As we have seen, sometimes two sets can have the same cardinality even when one seems obviously much bigger than the other. Show that the following sets have the same cardinality. In part a, give a complete proof by finding a bijection. In part b, consider our proof that the rationals are countable. (a) The interval (0,1) and the real numbers, R (b) The integers, Z, and the Cartesian Product of the integers with itself, Zx Z
You will develop an E-Commerce database used to maintain customers, products and sales information. You are...
You will develop an E-Commerce database used to maintain
customers, products and sales information. You are required to 1)
gather and analyze requirements 2) design logical structure of the
database 3) create stored procedures to develop the tables and
insert the data 4) write SQL statements for data extraction and
reporting.
Throughout the course of this semester you have analyzed the
requirements for an eCommerce database, designed and developed your
database. As a class we have gone through the process...
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Summarize these pages in your own style and you have to include in your report some...
Summarize these pages in your own style and you have to
include in your report some figures highlighting the relation
between these operations.
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ETHICS WORK e chapter has presented ethical dilemmas that sometimes arise when us- an international labor...
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4. As we have seen, sometimes two sets can have the same cardinality even when one seems obviously much bigger than the other. Show that the following sets have the same cardinality. In part a, give a complete proof by finding a bijection. In part b, consider our proof that the rationals are countable. (a) The interval (0,1) and the real numbers, R (b) The integers, Z, and the Cartesian Product of the integers with itself, Zx Z
You will develop an E-Commerce database used to maintain
customers, products and sales information. You are required to 1)
gather and analyze requirements 2) design logical structure of the
database 3) create stored procedures to develop the tables and
insert the data 4) write SQL statements for data extraction and
reporting.
Throughout the course of this semester you have analyzed the
requirements for an eCommerce database, designed and developed your
database. As a class we have gone through the process...
Write a program in either C++ or Java meeting these requirements Description: In this program, we assume that our data comes in dynamically. We need to maintain our data in a heap, after every insertion and deletion. We also need to handle the underlying array dynamically. whenever we detect an overflow in our array, we will create a new array with size doubling the previous size. Requirements: 1. (Dynamic Data) when we generate the data, we simulate dynamic data. We...
Summarize these pages in your own style and you have to
include in your report some figures highlighting the relation
between these operations.
Basic AGGREGATE functions (Revision) COUNT: returns the number of tuples, which meet the specified condition: SELECT COUNT(DISTINCT Dept) AS Num_Depts FROM subject: SUM: returns the sum of the values in a specified column (i.e. numeric column) SELECT COUNT(*) AS hi_sal, SUM(salary) FROM Lecturer WHERE Salary > 4500 MIN: returns the minimum value in a specified column (numeri...
ETHICS WORK e chapter has presented ethical dilemmas that sometimes arise when us- an international labor force to manufacture products. The following sce- rio is your chance to apply the concepts to a business situation. What hould the CEO do? Why? Answer the questions that follow the scenario, and be prepared to respectfully argue for your point of view in class. Main Issue and Options Issue: Should the CEO renew the contract with Quality Dragon, Limited, or should he seek...
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