CSC 177 Data warehouse and Mining project Pooja Vora Vishma Shah Guided by Prof. Meiliu lu
Agenda Data Warehouse Project Introduction Background Scope of study Implementation Data Cleaning and Preprocessing Data Mart Data Mining Project Introduction Background Scope of study Implementation Data mining Learning experience Future Scope References
Data Warehouse Introduction The objective of our project is to create a data mart with star schema Data mart will be used to find answers related to various company key factors and statistics.
Background Source website : Navathe company schema Dataset : Company dataset Company dataset : Fact table - 7 attribtues,1000 entries
Scope Of Study Data Preprocessing Microsoft Office Excel Microsoft SQL Server Data Mart Microsoft SQL server, Visio, convertcsvtosql Olap Operations SQL server queries
Implementation Data Cleaning & Preprocessing Data Mart Olap Operations
Data Cleaning & Preprocessing The company schema had different tables as per navathe, we also added few dimension for analytical processing and created a fact table with star schema.
Data Mart We have 5 dimension tables in our data mart and one fact table which forms star schema. The Fact table tables consists of around 1000 rows having various details about ssn, project, work_id etc
Star Schema
Data Mart Question-Answers How many products were produced over the months? Rollup How to find employee current working project? Slicing on employee dimension How to find the statistics of days where more than 5 products were produced Dicing on product and work dimension How to find which days and how many products of particular product were produced? Scoping
Olap Operations Example Roll Up select t.date_year, t.date_month, sum(w.numberofproduct) as 'No. Of Products' from EmpFactTable f, DimTime t, DimEmp_work_record w where f.date_key= t.date_key and f.work_id = w.work_id group by date_year, date_month with rollup date_year date_month No. Of Products 2014 1 980 2014 2 761 2014 3 1274 2014 4 240 2014 NULL 3255 NULL NULL 3255 winning month
Quiz Which dimension was used for slicing cube? Employee Time Work Product Answer - Employee
Data Mining Project
Perform Data mining on data set to discover knowledge Apply data mining algorithms using tools compare the performance of algorithms using these tools. Compare the tools performance Introduction
Background Source Website www.data.gov Dataset : Consumer complaints Data: - 14 attribtues, 55000 entries (Data from 2012 to 2014)
Scope Of Study Data Preprocessing Microsoft Office Excel Tools (Weka, Rapidminer) Data Mining Tools : Weka, Rapidminer Algorithms : K-Means, Naïve Bayes
Implementation Data Cleaning & Preprocessing Data Mining Tools Comparision
Data Cleaning & Preprocessing Data Cleaning - Replaced missing values with unknown Data selection Selected Consumer complaints data of two months (Sept, Oct) for mining Sample Data selected as 3000 rows
Data Mining We have used One Classification & One Clustering Algorithm Classification Naïve Bayes Clustering K-means
Data Mining Demo
Tools Comparision : K-Means Rapid Miner Weka
Tools Comparision : Naïve Bayes Rapidminer Weka
Quiz Which Clustering Algorithm was used for data mining? K-Means EM Answer K-means
Learning Experience Learned the analytical processing through data mart project. Helped to improve knowledge for Database statistics Learned to gain information out of the querying results. Learned different data mining tools like weka and rapid miner Improved understanding of various algorithms and their practical implementation through tools Learned to make sense out of the results obtained from the tools
Future Scope Data Warehouse Create a snowflake schema by introducing dimension like employee types contractors/fulltime and then take it further for analytical processing for different statistics Data Mining Can implement other algorithms and tools like orange etc
References Elmasri and Navathe, Fundamentals of Database System, 6th Edition, Addison-Wesley Publishing OLAP Courseware http://athena.ecs.csus.edu/~olap/olap/introduction.php DM dataset http://www.data.gov/consumer/ Data Mining Courseware http://athena.ecs.csus.edu/~datamini https://rapidminer.com/wpcontent/uploads/2013/10/rapidminer_ra pidminerinacademicuse_en.pdf
Questions.