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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

12 Must Read DevOps Principles That Give Fair Idea on The Concept

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Here're twelve essential DevOps Principles. Below is the useful list for your sure success in your next interview. 12 DevOps principles To deliver rapidly without affecting the quality. Improved Communication and Collaboration. Multiple deploys are possible if the code in the development team is automated. Once you commit to the repository, it tests the code automatically using the automated test scripts. If the Build passed, it installs automatically. Installs automatically to n number of servers. Minor changes take place in isolation - it creates a separate server to deploy minor changes. Speed in DevOps helps organizations to serve their clients faster and more effectively. Quality and Security teams. Automating the process improves productivity over the manual method. Deploy frequently - the changes can be small or big. DevOps has multiple benefits over traditional approach. Related What is DevOps