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Showing posts from February, 2017

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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