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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

Cloud Security rules top book to read it now

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The Cloud Security Rules explains the different aspects of cloud security to business leaders, CxO's, IT-managers and decision makers. The security principles are the same as before while the implementation and the risks involved are dramatically changed. The book is co-authored by some of the most recognized security specialists and bloggers in the world. The authors are gathered from USA, Europe and Africa, sharing their great knowledge of implementing and securing the cloud. This book is made to help it easier for you to choose the right cloud supplier as well as setting up and running your critical services in the cloud. 1. Questions you will find answers about include Do I have to accept that standard SLA? What should an SLA include? What standards should I be paying attention to, if any? How do I treat mobile workers, and how do they fit into the cloud? Do I really need to care about logging? 2. Other Stuff You Will Learn Many more! Since the cloud co