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SQL Query: 3 Methods for Calculating Cumulative SUM

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SQL provides various constructs for calculating cumulative sums, offering flexibility and efficiency in data analysis. In this article, we explore three distinct SQL queries that facilitate the computation of cumulative sums. Each query leverages different SQL constructs to achieve the desired outcome, catering to diverse analytical needs and preferences. Using Window Functions (e.g., PostgreSQL, SQL Server, Oracle) SELECT id, value, SUM(value) OVER (ORDER BY id) AS cumulative_sum  FROM your_table; This query uses the SUM() window function with the OVER clause to calculate the cumulative sum of the value column ordered by the id column. Using Subqueries (e.g., MySQL, SQLite): SELECT t1.id, t1.value, SUM(t2.value) AS cumulative_sum FROM your_table t1 JOIN your_table t2 ON t1.id >= t2.id GROUP BY t1.id, t1.value ORDER BY t1.id; This query uses a self-join to calculate the cumulative sum. It joins the table with itself, matching rows where the id in the first table is greater than or

Hadoop: How to Improve College a Mini Project

This is based on my research of developing an engineering college using data analytics. This is a great subject that can be applied by all engineering aspirants in their final project. In my view it has dual benefits.

The one is for student they can gain lot of analytics knowledge and application to develop engineering college to keep it in the list of top colleges. The second is for Engineering colleges they can benefit to improve quality of education and to become one of the top colleges.

Hadoop: How to Improve College a Mini Project

Hadoop: How to Improve College a Mini Project



The project theme is data analytics:

There are total 2 parts:
  1. Use Hadoop technologies to study student database what they did in School level- This gives lot of insights on the Student interests. Approach each student and get some innovative ideas to improve the college
  2. Use Faculty database to get the skills and projects what they did in previous years. This helps to get right faculty for new innovative project
Basically the qualities of good engineering college you can be classified based on the below criteria.
  1. Infrastructure
  2. Lab facilities
  3. Transport facilities
  4. Practical oriented study
  5. Connection to industry
If the students find in their Hadoop project the improvements needed, then this can be showcase to industry. So that it improves industry connections. This is not only to one branch. This can be applied to any branch.

The areas where data analytics can be applied based on my research are

  • Good infrastructure
  • Best educational environment
  • Latest technologies used by the college
  • A better placement cell
  • Academic reputation of college
  • No. of accreditation college have
  • Placement percentage
  • No. of merit students
  • and so on....

So, the above are the key areas you can improve engineering college to get top rank.

The technologies for data analytics.
  1. Hadoop Platform
  2. Data base
  3. NoSQL database
  4. Presentation tool
Once you get the week areas, you will get a Chance to improve your college. So trail and error will take lot of time and it was possible in olden days.

Now a days you need technology and Tools. This is also a mutual benefit project.

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