Transcript PPT
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 Introduction • 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 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 Addison-Wesley Publishing Database System, 6th Edition, • 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….