fundemental of data systems - Computer Science
SQL Individual Assignment
Assume that Orion Star Sports & Outdoors Co. has engaged you as a consultant to advise them on business strategies to increase sales. Study the data tables from this perspective. The most important tables in this data set are:
+ orders + product_line
+ products + profit
1. Answer the following questions in general:
a) What are the key business questions that can be asked and answered using this data?
b) How does each table relate to answering those questions?
c) How do I have to link the tables in order to be able to answer those questions?
2. For each field in the four tables, answer the following specific questions:
a) Is this a question field, an answer field, or a link field? In other words, is this a key dimension along which I wish to analyze the data (question field), a data item that I want to “slice and dice” along selected dimensions (answer field), or a field that simply helps me link from one table to another?
b) What data type is represented by this field (e.g. integer, text, symbols, currency, etc.)?
c) Are there missing or null values in the data for this field?
d) For range fields (e.g. dates and numbers), what is the range of values in the data? What are the maximum and minimum values?
e) What do you think is the purpose of this field?
f) What questions would you ask the company about this field?
3. Prepare spreadsheets that answer the following questions:
a) What are the top 10 products for orders (by dollar volume)?
b) What are the top 10 countries for orders (by dollar volume)?
c) What are the top 10 selling products by units? By dollar volume?
d) For top two US states and top two countries (excluding the US) in questions 1 and 2, what are the 5 top selling products by units? By dollar volume?
e) Provide the customer ID’s, order dates, and order amounts for all customers who have ordered more than once.Chapter 4
Relational Data Retrieval: SQL
Fundamentals of Database Systems
Chapter Objectives
Describe SQL as a relational data manipulation language.
Explain that you can create and update relational tables using SQL.
Write SQL SELECT commands to retrieve relational data using a variety of operators, including GROUP BY, ORDER BY, and the built-in functions of AVG, SUM, MAX, MIN, and COUNT.
Chapter Objectives
Write SQL SELECT commands that join relational tables.
Write SQL SELECT subqueries.
Describe a strategy for writing SQL SELECT statements.
Describe the principles of how a relational query optimizer works.
Data Management:
Data Definition
Operationalized with a data definition language (DDL).
Instructs the DBMS software on what tables will be in the database, what attributes will be in the tables, which attributes will be indexed, etc.
Data Management:
Data Manipulation
Refers to the four basic operations that can and must be performed on data stored in any DBMS.
Data retrieval
Data update
Insertion of new records
Deletion of existing records
Requires data manipulation language (DML)
SQL
Structured Query Language
Incorporates both DDL and DML features.
Very heavily used in practice today.
Building the Data Structure
Base tables - actual physical tables in which the data will be stored on the disk.
Created using the CREATE TABLE command.
Deleted using the DROP TABLE command.
Logical View
Also just called a view.
May consist of a subset of the columns of a single table, a subset of the rows of a single table, or both.
May also be the join of two or more base tables.
A mapping onto the base table(s).
Created using the CREATE VIEW command.
Data Manipulation Operations
UPDATE - used for updating existing data.
INSERT - used for inserting new rows in tables.
DELETE - used for deleting existing rows in tables.
Introduction: SQL SELECT
Used for data retrieval.
You specify what data you are looking for rather than provide a logical sequence of steps that guide the system in how to find the data.
Can be run in either a query or an embedded mode.
Command will work with Oracle, MS Access, SQL Server, DB2, Informix, etc.
The Basic SQL SELECT
SELECT <columns>
FROM <table>
WHERE <predicates identifying rows to be included>;
General Hardware Company SQL Query Example
The desired attributes are listed in the SELECT clause.
The required table is listed in the FROM clause.
The restriction (predicate) indicating which row(s) is involved is shown in the WHERE clause in the form of an equation.
“Find the commission percentage and year of hire of salesperson number 186.”
SELECT COMMPERCT, YEARHIRE FROM SALESPERSON
WHERE SPNUM=186;
General Hardware Company SQL Query Example, *
The “*” indicates that all attributes of the selected row are to be retrieved.
“Retrieve the entire record for salesperson 186.”
SELECT *
FROM SALESPERSON
WHERE SPNUM=186;
General Hardware Company SQL Query ExampBLCN 534 Fundamentals of Database Systems
SQL Individual Assignment
Assume that Orion Star Sports & Outdoors Co. has engaged you as a consultant to advise them on business strategies to increase sales. Study the data tables from this perspective. The most important tables in this data set are:
+ orders + product_line
+ products + profit
1. Answer the following questions in general:
a) What are the key business questions that can be asked and answered using this data?
b) How does each table relate to answering those questions?
c) How do I have to link the tables in order to be able to answer those questions?
2. For each field in the four tables, answer the following specific questions:
a) Is this a question field, an answer field, or a link field? In other words, is this a key dimension along which I wish to analyze the data (question field), a data item that I want to “slice and dice” along selected dimensions (answer field), or a field that simply helps me link from one table to another?
b) What data type is represented by this field (e.g. integer, text, symbols, currency, etc.)?
c) Are there missing or null values in the data for this field?
d) For range fields (e.g. dates and numbers), what is the range of values in the data? What are the maximum and minimum values?
e) What do you think is the purpose of this field?
f) What questions would you ask the company about this field?
3. Prepare spreadsheets that answer the following questions:
a) What are the top 10 products for orders (by dollar volume)?
b) What are the top 10 countries for orders (by dollar volume)?
c) What are the top 10 selling products by units? By dollar volume?
d) For top two US states and top two countries (excluding the US) in questions 1 and 2, what are the 5 top selling products by units? By dollar volume?
e) Provide the customer ID’s, order dates, and order amounts for all customers who have ordered more than once.
1
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4. A U.S. Supreme Court case known as Furman v. Georgia (1972) is a landmark case that involved Eighth Amendment’s ban of unusual and cruel punishment in death penalty cases (Furman v. Georgia (1972)
With covid coming into place
In my opinion
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5 The family dynamic is awkward at first since the most outgoing and straight forward person in the family in Linda
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From a similar but larger point of view
4 In order to get the entire family to come back for another session I would suggest coming in on a day the restaurant is not open
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After viewing the you tube videos on prayer
Your paper must be at least two pages in length (not counting the title and reference pages)
The word assimilate is negative to me. I believe everyone should learn about a country that they are going to live in. It doesnt mean that they have to believe that everything in America is better than where they came from. It means that they care enough
Data collection
Single Subject Chris is a social worker in a geriatric case management program located in a midsize Northeastern town. She has an MSW and is part of a team of case managers that likes to continuously improve on its practice. The team is currently using an
I would start off with Linda on repeating her options for the child and going over what she is feeling with each option. I would want to find out what she is afraid of. I would avoid asking her any “why” questions because I want her to be in the here an
Summarize the advantages and disadvantages of using an Internet site as means of collecting data for psychological research (Comp 2.1) 25.0\% Summarization of the advantages and disadvantages of using an Internet site as means of collecting data for psych
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I think knowing more about you will allow you to be able to choose the right resources
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One thing you will need to do in college is learn how to find and use references. References support your ideas. College-level work must be supported by research. You are expected to do that for this paper. You will research
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3 The first thing I would do in the family’s first session is develop a genogram of the family to get an idea of all the individuals who play a major role in Linda’s life. After establishing where each member is in relation to the family
A Health in All Policies approach
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Read Connecting Communities and Complexity: A Case Study in Creating the Conditions for Transformational Change
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Losinski forwarded the article on a priority basis to Mary Scott
Losinksi wanted details on use of the ED at CGH. He asked the administrative resident