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Data science bootcamp day1
Mark Zuckerberg wants analytics on daily Facebook users and messages from distributed data centers. He could write SQL queries to get this data from the distributed MySQL database. The document then provides an example query to find the daily users by counting user IDs grouped by last updated date. It also gives a sample query to find the daily messages sent by each user, grouping the message count by user and date. The document concludes with discussing collection frameworks in Java, concurrency, and having a Q&A session.
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Data science bootcamp day1
- 1. Data Science Bootcamp, Day1 Presented By: Chetan Khatri, Volunteer Teaching assistant, Data Science Lab. Guidance By: Prof. Devji D. Chhanga, University of Kachchh
- 2. Agenda An Introduction toData Science with Industrial perspective. An Introduction to Distributing System CAP Theorem Collection frameworks in Java
- 3. Querying in Distributed MySQL Example ● FacebookCEO Mark Zukerberg wants to Analyze Data, he wants to know How many Daily Users ? , How many Daily Messages ? ● Assume that, Facebook’s Data center is available at California, Germany, Japan, Bangalore, Kenya. ● Assume that, Facebook is using MySQL as their Data storage RDBMS, How can he get it ? ● SQL ???
- 4. Querying in DistributedMySQL (conti…) Let’s think ! You have to Query for Single Node ! Let’s Start ! Mark wants to have Analytics Chart so he can do Analytics on top of that, so he can have ratios of customer behaviour such as how many users are churning / leaving his platform which includes the Facebook + WhatsApp ! Assume, Table Structure are as below.user_master User_id (PK) Created_on(DATE) last_updated_on(DATE) transaction_master trans_id (PK) user_id(FK) timespan(DATE)
- 5. Querying in DistributedMySQL (conti…) 1)Daily Users Desired Output: Date Daily Users 12-05-2016 32,00,000 13-05-2016 21,00,854 14-05-2016 22,54,246 15-05-2016 32,51,230 Query: Select last_updated_on as “Date” , count(user_id) as “Daily Users” from user_master group by last_updated_on order by last_updated_on;
- 6. Querying in DistributedMySQL (conti…) 1)Daily Messages by User Desired Output: User Date Messages Drew Houston 12-08-2016 700 Satya Nadella 12-08-2016 652 Sundar Pichai 12-08-2016 352 Tim Cook 12-08-2016 154 Query: Home work !
- 7. Collection Framework inJava How could you think About Hashset in Java? How could you think About ArrayList in Java?
- 8. Concurrency in Java WhyThreading ? How it can help you to optimize the performance / throughput ?
- 9. Q & Asession Questions Please !!
- 10. Thankyou Chetan Khatri, VolunteerTeaching Assistant, Data Science Lab, University of Kachchh. Email: chetan@kutchuni.edu.in Github Data Science Lab: https://github.com/dskskv CCCS936 Repository: https://github.com/dskskv/CCCS936