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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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2 Top Real-time AI New Approaches for Learners

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Artificial Intelligence (AI) applications in real-time have two approaches. Those are Applied and Generalized. This post tells you the differences between these two.

Artificial Intelligence (AI).

Artificial Intelligence is the broader concept of machines being able to carry out tasks in a way that we would consider smart.

How the AI started.  A machine, which has reproducing capabilities, basic arithmetic, and memory are called logical-machines. As enter into a new era, a new thought process created now called AI (Artificial Intelligence)

2 AI Real-Time Top Approaches for New Learners
AI Approaches

Artificial intelligence has two approaches - Applied and Generalized. 

  1. Applied Artificial Intelligence.  The Applied AI is, you can find in systems designed to trade the Stocks or maneuver an autonomous vehicle would fall into this category. 
  2. Generalized Artificial Intelligence.  Systems or devices that can, in theory, handle any task – are less common, but this is where some of the most exciting advancements are happening today.

Machine Learning (ML).

The father of Machine learning is Arthur Samuel. Machine Learning; the vehicle which is driving AI development forward with the speed it currently has.

Machine Learning, two reasons to invent it.
  • Rather than teaching computers everything they need to know about the world and how to do the tasks, instead, it might be possible to teach them to learn themselves. 
  • The second, more recently, was the emergence of the Internet and the increase in producing the amount of digital information.

Summary.

What do you need to do? Code logic in such a way that machines to act intelligently without human intervention. It is the funda of ML.

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