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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

How to Work on Re-skill Legacy to Recent

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How to work on your reskill plan to grow your career from any level. Just you need to learn and be ready with proficiency. Someone will absorb you.

IoT In Healthcare Top Skills You Need

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IoT and multimedia technologies have made their entrance into the healthcare field thanks to ambient-assisted living and telemedicine. ... Role of Smart Devices Smart devices, mobile Internet, and Cloud services contribute to the continuous and systematic innovation of Healthcare and enable cost-effective, efficient, timely, and high-quality ubiquitous medical services. Skills You  Need  Data Analytics  Cloud Computing  Security  Smart Device "Pervasive healthcare applications generate a vast amount of sensor data that have to be managed properly for further analysis and processing." The adoption of Cloud in this scenario leads to the abstraction of technical details, eliminating the need for expertise in, or control over, the technology infrastructure, and it represents a promising solution for managing healthcare sensor data efficiently. It further makes mobile devices suited for health information delivery, access, and communication, also on the go, enhancing medical

Hot Skills: Spark Self Study Materials

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Spark: With job postings up 120% year-over-year on Dice, demand for this open-source cluster-computing framework is broad-based. Government contractors and financial-services firms are just a few of the groups eager to find candidates with this skillset. 2015 Average Salary: $113,214 Related: SPARK Self Study Materials Spark Big Data and Cloud:  As companies expand their tech infrastructures, they need cloud and Big Data services such as Azure (#2), Hive (#8), and Cassandra (#9) for data storage, analysis, and security. Big Data and cloud-related skills dominated the Highest-Paid Skills list on Dice’s salary survey for the second straight year.  2015 Average Salary: Big Data—$121,328 Azure — $110,207 Salesforce: This customer-service platform serves as the bedrock for many companies’ customer service departments. Demand for Salesforce professionals seems unlikely to decline anytime soon. Employers are even willing to offer telecommuting options to lure Salesforce talent. 2

10 Hot IT Skills great demand Beyond 2020

The below are the highest demanding and high-paying IT jobs in 2016 Wireless Network Engineers can expect a 9.7 percent increase in pay, ranging from $108,750-$150,750, which is the highest increase in starting salary of all IT jobs in our guide! What’s going on here? The general push toward wireless offices and the growth of mobile application development, which requires testing mobile apps in a wireless environment, are just a few reasons for the increased starting pay.  CRM Business Analyst -2015 salary: $84,500-$116,750 -2016 salary (est): $87,500-$126,000 - Percent increase (est): 6.1%  Data Modeler - 2015 salary: $101,750-$145,250 - 2016 salary (est): $106,750-$155,500 - Percent increase (est): 6.2%  Business Intelligence Analyst -2015 Salary: $108,500-$153,000 -2016 Salary (est): $113,750-$164,000 -Percent increase (avg): 6.2%  Data Scientists and Big Data Engineers are both projected to see an 8.9 percent increase in starting pay over 2015, ranging from $109,000-$153,

Best Skills You Need to Become an IoT Developer

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The Internet of things is a new subject. In this area lot of development is going on. Recently, AWS ( Amazon web services ) developed a platform for the Internet of things. I want to share with you the best skills you need to become an IoT developer. Skills You Need to Become an IoT developer This is a big Question for IT freshers or experienced IT professionals what technologies they need to learn to start a career in this line.  As a general rule, I have found the following are general requirements for the Internet of things ( See Internet of things jobs here ). Java + multiple programming languages (Objective-C, C++), and interest in technologies such as Ruby, Scala, Clojure, Groovy, etc. Experience in javascript libraries in any combination of the following areas: jQuery, AngularJS, Backbone.js, Ember.js, Node.js, GWT Development experience in open source projects, especially large scale projects a plus. Experience developing at-home projects used by a medium to large size au

Switching Career Top Skills for Mainframe Programmers

Read my part-1 post. Secondly, the programmers who are working on the mainframe have very good business knowledge.  People who have the following skills are a valuable asset to any organization. Mainframe programmers if they learn other skills and try for new jobs they can earn more money. Programmer Roles. A programmer who can do analysis, create database structures, write clean code, create testing structures, and clearly communicate all that has been done is a very valuable asset. Background of Mainframe. The mainframe was leading in the market since 1950. All the big companies in the world are running their business in mainframes.  Yes, many American universities now teaching mainframe technology in their education curriculum, since in the future possibility is there for mainframe skill shortage. Skills You Need to Switch Career. It may become more important for IT professionals to gain experience working with analytics technology , as research firm Gartner predicted a surge in d

2 Top Skills You Need For E-commerce

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The following skills are must for every data analytics engineer to be successful in e-commerce companies. Many software engineers are struggling to get this information. I am giving here both technical and general skills. 1# Technical Skills for Analytics Career What skills they need to be successful in their analytics career. The skills required to get an entry into the Analytics job are here for your reference. I have told in my previous posts that there are many branches in analytics . You need to apply domesticated techniques to extract actionable knowledge. 2# General Skills I have selected the following mindset and skills that you need to get a job in data analytics. These are proven skills. Set a clear goal to acquire these skills. Strong interpersonal, oral and written communication and presentation skills;  Ability to communicate complex findings and ideas in plain language  Being able to work in teams towards a shared goal;  Ability to change direction quickl