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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

5 Top SEO Optimization Books to Read Today

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👉   Maximize Your Social: A One-Stop Guide to Building a Social Media Strategy for Marketing and Business Success Have you been staring at a blank slate without any inspiration for your social media marketing? Do you struggle to find the time and keep up with a consistent social media schedule? If you’ve answered yes to any of these questions, then you’ve come to the right place. This actionable book will help you get organized as you build a regular schedule of relevant, engaging content that will build your social media following. Maybe you're a marketer, a social media manager, or a blogger who wants to cut out the noise by reading one book that will show you how to make the most of your time. You no longer have to wonder where your time is going! As the content marketers at CoSchedule, we’ve personally used every piece of advice in this book. It’s helped us get around 60K followers across our social platforms—and you can experience the same success.  👉   How To Get To The T

Why Learning Python is so useful?

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I have recently started learning Python. During my learning time, my friends have asked since you are interested in analytics why you need to learn Python . I explained the below reasons. This is one of the powerful languages after Java. Python is similar to many programming languages that people generally know about:  Python is very similar to JavaScript, Ruby , and PHP in many respects.  Most programmers have a working knowledge of these programming languages and this makes it easier for programmers to learn Python. The basic features of these languages such as the use of arrays, anonymous functions, etc., are also present in Python.    1. Python Machine Learning Libraries: The variety of machine learning libraries that are available in Python is large. One can choose between Scikitlearn, Keras, Theano, and Tensorflow. Many neural network libraries such as Keras, Theano, etc., are exclusively available in Python. So, if you want to do cutting edge machine learning work, you must kno

R Language basics for Beginners to Apply in Analytics

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In the early days, a key feature of R was that its syntax is very similar to S, making it easy for S-PLUS users to switch over. While the R’s syntax is nearly identical to that of S’s, R’s semantics, while superficially similar to S, are quite different. Steps to learn R Language In fact, R is technically much closer to the Scheme language than it is to the original S language when it comes to how R works under the hood. Today R runs on almost any standard computing platform and operating system. Its open-source nature means that anyone is free to adapt the software to whatever platform they choose. #R language basics Indeed, R has been reported to be running on modern tablets, phones, PDAs, and game consoles. One nice feature that R shares with many popular open-source projects is frequent releases. These days there is a major annual release, typically in October, where major new features are incorporated and released to the public. Throughout the year, smaller-scale bugfix release

3D Rendering Hot Skills in The Market

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#The powerful points on 3DRendering: In the real world, light sources emit photons that normally travel in straight lines until they interact with a surface or a volume. When a photon encounters a surface, it may be absorbed, reflected, or transmitted.  Some of these photons may hit the retina of an observer where they are converted into a signal that is then processed by the brain, thus forming an image. Similarly, photons may be caught by the sensor of a camera. Also Read : Top Selected books on 3D Rendering In either case, the image is a 2D representation of the environment. The formation of an image as a result of photons interacting with a 3D environment may be simulated on the computer. The environment is then replaced by a 3D geometric model and the interaction of light with this model is simulated with one of a large number of available algorithms. The process of image synthesis by simulating light behavior is called rendering. The below are the best resources for

Tableau 2 Top Books to Read

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In this post, I have given two top data visualization in Tableau books. These books helpful for your self-study.   Top Tableau Course Contents Introduction to Tableau  Connecting to data  Visual analytics  How to design dashboard  Mapping  Calculations  How to publish and Manage with Tableau  Security with Tableau ..... Read more . Two Best books on Tableau to Learn and Visualize the Data. #1.  Learning Tableau Learn how to create effective data visualizations with Tableau and unlock a smarter approach to business analytics.  It might just transform your organization About This Book Create stylish visualizations and dashboards that explain complexity with clarity. Learn effective data storytelling to transform how your business uses ideas and makes decisions Explore all the new features in Tableau 10 and start to redefine what business. analytics means to your organization. #2.  How to create Data Visualization in Tableau  Tableau Your Data! is a co

10 Top Differences Between Unix and Linux

UNIX It is an operating system which was first developed in the 1960s and has been under constant development ever since. By operating system, we mean the suite of programs which make the computer work. It is a stable, multi-user, multi-tasking system for servers, desktops, and laptops. UNIX systems also have a graphical user interface (GUI) similar to Microsoft Windows which provides an easy to use environment. However, knowledge of UNIX is required for operations which aren't covered by a graphical program, or for when there is no windows interface available, for example, in a telnet session. The kernel - The kernel of UNIX is the hub of the operating system: it allocates time and memory to programs and handles the filestore and communications in response to system calls. As an illustration of the way that the shell and the kernel work together, suppose a user types rm myfile (which has the effect of removing the file myfile). The shell searches the filestore for the file c

15 awesome Java Interview Questions to know

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Java interview is one of the tough interviews for developers coming from other technologies. So I have given very basic interview questions they asked. Really awesome to know these questions. 1. What is JVM? Why is Java called the ‘Platform Independent Programming Language’? JVM, or the Java Virtual Machine, is an interpreter that accepts ‘Bytecode’ and executes it. Java has been termed as a ‘Platform Independent Language’ as it primarily works on the notion of ‘compile once, run everywhere’. Here’s a sequential step establishing the Platform independence feature in Java: The Java Compiler outputs Non-Executable Codes called ‘Bytecode’. Bytecode is a highly optimized set of a computer instruction which could be executed by the Java Virtual Machine (JVM). The translation into Bytecode makes a program easier to be executed across a wide range of platforms since all we need is a JVM designed for that particular platform. JVMs for various platforms might vary in configuration, those they w