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SQL Interview Success: Unlocking the Top 5 Frequently Asked Queries

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 Here are the five top commonly asked SQL queries in the interviews. These you can expect in Data Analyst, or, Data Engineer interviews. Top SQL Queries for Interviews 01. Joins The commonly asked question pertains to providing two tables, determining the number of rows that will return on various join types, and the resultant. Table1 -------- id ---- 1 1 2 3 Table2 -------- id ---- 1 3 1 NULL Output ------- Inner join --------------- 5 rows will return The result will be: =============== 1  1 1   1 1   1 1    1 3    3 02. Substring and Concat Here, we need to write an SQL query to make the upper case of the first letter and the small case of the remaining letter. Table1 ------ ename ===== raJu venKat kRIshna Solution: ========== SELECT CONCAT(UPPER(SUBSTRING(name, 1, 1)), LOWER(SUBSTRING(name, 2))) AS capitalized_name FROM Table1; 03. Case statement SQL Query ========= SELECT Code1, Code2,      CASE         WHEN Code1 = 'A' AND Code2 = 'AA' THEN "A" | "A

Three Top RPA tools functional differences

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Robotic process automation is a grown-up area. Many IT developers across the board started up-skill in this popular area. This post is useful for Software developers who are interested in RPA (Robotic Process Automation). In my previous post , I have shared twelve RPA tools. Out of those, three tools are the most popular. Those are Automation Anywhere, BluePrism, and Uipath. This post covers differences in these tools. Blue Prism Blue Prism has taken a simple concept, replicating user activity on the desktop, and made it enterprise strength. The technology is scalable, secure, resilient, and flexible. It is has a comprehensive methodology, operational framework, and provided as packaged software. The technology is developed and deployed within a corridor of IT governance. It has sophisticated error handling and process modeling capabilities to ensure it can perform at scale within demanding, highly sophisticated operating environments. The combination of SOA/BPMS and Blue Prism pl