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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
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IBM these are analytics solutions offering to different industries

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IBM analytics

Every industry has its own particular big data challenges. Banks need to analyze streaming transactions in real time to quickly identify potential fraud. Utility companies need to analyze energy usage data to gain control over demand. 

Retailers need to understand the social sentiment around their products and markets to develop more effective campaigns and promotions. Analytics solutions help organizations take control of big data and uncover the insights they need to make the best decisions.

IBM has Analytics Solutions in various lines:

  • Banks: Apply analytics to improve customer experiences and operational efficiency, and integrate risk into daily decision making.
  • Communication:Uncover insights about customers, network performance and market trends to make better business decisions.
  • Retail: Build lifetime customer relationships by meeting demands for innovative products while containing costs.
  • Education: Make more informed decisions to improve student performance and increase operational efficiency.
  • Energy Analytics: Transform your utility network and optimize customer operations with smarter energy systems.
  • Government: Gain insight into program performance, traffic patterns, public safety threats and more to better protect and serve citizens.
  • Healthcare: Anticipate, shape and optimize business and patient outcomes, and enable evidence-based, personalized medicine.
  • Industrial: Apply analytics in aerospace, defense, automotive, electronics, chemicals, petroleum, or industrial products companies.
  • Insurance: Deploy analytics at the point of impact to support better decisions about underwriting, claims and other areas of your business.
  • Life Sciences: Act on insights to drive growth, enhance relationships across the ecosystem and improve clinical development processes.
  • Media: Use analytics to provide a differentiated customer experience and drive operational transformation.
  • Transportation: Enhance services, manage capacity, and maximize the availability of assets and infrastructure.

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