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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

The best career skills need for Social media platform

How-to-apply-social-media-analytics-for-all-it-developers
#How-to-apply-social-media-analytics-for-all-it-developers
Listening - This one is still very much true, and perhaps even more so. The best social media pros listen the most actively and most aggressively.
Pattern Recognition - This is getting more and more critical as the data and complexity of social continues to ratchet up. Are these posts on our Facebook page a crisis in the making, or just noise? Where are the real-time marketing opportunities? Instantly identifying patterns and being able to capitalize upon them are some of the skills that separate good social practitioners from great ones.
Visual Thinking - This is perhaps the biggest change in the past year or two. Being a great writer was formerly a key characteristic of many social pros, as being able to coherently write in 140 characters isn’t as easy as it appears. Today, with every social network embracing visuals and multi-media, being able to represent the brand visually is absolutely critical. This is a real challenge for many community managers who come from the PR/communications side of things, and all of a sudden need to be quasi graphic designers. I’m a big believer in social media pros taking photography classes in 2014.

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