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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

3 top IT Skills every new IT Professionals learn to progress in software career

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What are the skills needed by the new IT professionals or job seekers who help the  organisation  transition to IT-as-a-Service.  In order  to lead their  organisations  to the cloud, IT professionals must focus on three fundamental areas: Core  Virtualisation  Skill Sets IT professionals must think and operate in the virtual world. No longer can they be tied to the old paradigm of physical assets dedicated to specific users or applications. They must think in terms of “services” riding on top of a fully virtualized infrastructure, and how applications will take advantage of shared resources with both servers and storage. This requires comprehensive skills in both server and storage virtualization technology, and enough experience as a practitioner to understand the intricacies and critical elements of managing virtual platforms. Rules of Old IT and New IT Cross-training Competency Leaders of IT innovation cannot be completely siloed and hyper-focused. Although there will

Best Acronyms for Different IT Skills

You don’t need to be an IT expert to recruit and hire great technology candidates. Use Dice’s Technical Skills Glossary as your handy reference for easy-to-understand definitions on popular IT skills. Read more here.