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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

Social Analytics - How Marketers Will Use

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Of all the windows through which a business can peer into an audience,  social media  seems most enticing. The breadth of subjects, range of observations, and, above all, the ability to connect and draw inferences make  social analytics  hugely exciting for anyone who is interested in understanding and influencing past, present and potential customers, employees, or even investors. As individuals leave traces of their activities - personal, social and professional - on the internet, they allow an unprecedented view into their lives, thoughts, influences and preferences. Social analytics attempts to draw useful understanding and inferences, which could be relevant to marketers, sales persons, HR managers, product designers, investors and so on. Thus, as social tools like Facebook, Twitter, LinkedIn, WhatsApp, and many more, host a plethora of social activities of many people, a humongous amount of data is generated about people's preferences, behaviour and sentiments. Like any da

Teradata: Key Role in Telecommunication Analytics

Teradata, a US analytics solutions and applications provider, has said that there is a growing market for next-generation analytics in India amid intense competition among telcos and growing mobile phone penetration. Insights Carriers with increasing consumer focus require next-generation analytics to unify data from both the traditional and Big Data environments and transform it into meaningful insights - on how subscribers are consuming their services and in turn how they can improve their marketing tactics for upselling, customer retention, and loyalty. And ever since mobile number portability ( MNP) - a facility that allows subscribers to retain their numbers despite switching operators - was introduced late 2010 in India, customer retention has become a key imperative for service operators such as Vodafone India, Idea Cellular, and Bharti Airtel. Telecom Analytics "With rising teledensity, ensuing competition, and falling average revenue-per-user, telcos will have to look b

Trends In Digital Marketing in 2014-2015

Digital marketing uses various tools for digital marketing functions such as sales CRM, marketing automation, e-commerce, e-mail, WCM, web analytics, and social CRM. Related Skills for Digital Marketing You Need All these software tools collectively help an organization to develop and implement effective marketing strategies. Tools for Global Digital Marketing These tools are developed to serve specific functions in the Global Digital Marketing market as explained below: Sales CRM manages customer interaction and aligns an organization's sales process such as order tracking, sales performance, and distribution. Marketing automation enhances the capabilities of the marketing department of any organization to design strategies, automate processes, and improve customer communications, and also operates either as standalone software or as a major component of CRM software. E-commerce software offers advanced capabilities for searching, order management, cart management, and cont

Skills Need Every Employee By 2020

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With all the  predictions about the future of work , we are constantly painting a picture of how the future workplace will look. But, what most of us should focus on is what the workforce will  need   to look like – meaning, what skills employees need to have to ensure continued success into the next decade? The  Top 10 Online Colleges website  has the answer. They’ve done the research and compiled a list of skills that all employees will need by 2020 (which is only six years away!) and the drivers of the new skill set. First, we must understand what is driving change and molding the future of work. The six key drivers of change include: Extreme longevity:  People are living longer. The rise of smart machines and systems:  Tech will augment and extend our own capabilities. Computational world:  There will be an increase in sensors and processing that will make the world a programmable system. New media ecology:  There will be new communication tools that will require med

Wipro Expecting More Projects on Analytics and Cloud

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#Wipro Expecting More Projects on Analytics and Cloud: Bangalore-based IT firm WiproBSE 1.17 % expects to land bigger deals for solutions based on digital technologies like social, mobility, analytics and cloud, a sign that companies are willing to increase their spend on these discretionary areas.  "While our sweet spot is deals in the $2.5-3.5 million (Rs 15-21 crore) range, we are seeing deals worth $5-10 million (about Rs 30-60 crore) in the pipeline," Jeff Heenan-Jalil, global head of Wipro's advanced technology solutions unit said   in an interview to ET.  Wipro's rivals including TCS, InfosysBSE 1.65 % and Accenture have all created separate units to target the digital business, which is based on the technologies which go by the acronym SMAC. The business has typically involved smaller deals till now and posed a problem for IT companies trying to raise their share of revenue from these services.  Read more at: http://economictimes.indiatimes.com/a

UNIX Shell Scripting and Job Scheduling

Shell scripting and job scheduling are two major tasks for any UNIX developer. I am presenting here essential commands that need for any developer. Shell Scripts commands Shell script basics Variables in shell scripts Kornshell arithmetic  Commands for scripts Flow control, tests, and expressions Making Scripts Friendlier Functions Pipes and Shell Scripts Scripts with awk and/or sed Job Scheduling commands bg and at cron Read here

India's Second Largest Analytics Company

India's Second Largest Analytics Company- http://t.co/03r8P7MQJT — ApplyBigAnalytics (@applyanalytics) August 8, 2014