Showing posts with the label top features

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SQL Query: 3 Methods for Calculating Cumulative SUM

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.value, SUM(t2.value) AS cumulative_sum FROM your_table t1 JOIN your_table t2 ON >= GROUP BY, t1.value ORDER BY; 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

AWS to Understand EC2 Security

Amazon Elastic Computing Cloud, you can call it EC2. Here're EC2 top security features and shared frequently asked interview questions on EC2. Based on your requirement, you can increase or decrease computing power. Before you enable the Autoscaling feature, you need to know its impacts since it's the Administrator's responsibility. AWS to Understand EC2 Security AWS EC2 Making your existing hardware to the requirement always is not so easy. So EC2 service in AWS helps you to allocate computing power according to your needs.  AWS EC2 instance acts as your physical server. It has a memory. You can increase the instance size in terms of CPU, Memory, Storage, and GPU.  EC2 auto scaling is a property, where it automatically increase your computing power. Security Features in EC2 Virtual Private Cloud. The responsibility of Virtual Private Cloud is to safeguard each instance separately. That means, you cannot access other instances, which are already created by other organiz

2 Top Tableau Unique Features

Tableau is one of the most popular tools in data analysis. Learning the Tableau gives you so many options in data analysis career. You can download Tableau Software free version here . Get a complete understanding document on how Tableau works here . Read this post for advancing in your Tableau Career. Unique functionality in Tableau Tableau Software was founded on the idea that analysis and visualization should not be isolated activities but must be synergistically integrated into a visual analysis process. Visual analysis means specifically: 1). Data Exploration Visual analysis is designed to support analytical reasoning. The goal of the visual analysis is to answer important questions using data and facts. In order to support analysis, it is not enough to only access and report on the data. Analysis requires computational support throughout the process. Typical steps in the analysis include such operations as filtering to focus on items of interest sorting to rank