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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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6 IT skills you need to be successful in IoT (Internet of things) Career

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http://www.indeed.com/jobs?q=Internet+of+things&l=United+States&indpubnum=6634974704162507
[Jobs on IoT]
The following 6 skills needed to become successful in IoT career:

Business Intelligence: Collect, store, & analyze smart device data streams, sensor data
analysis, data center management, predictive analytics, and programming skills in
leading big data platforms

Information Security: Vulnerability assessment, PKI security, ethical hacking, wireless
network security, data ethics, and privacy policies

 UI/UX Design: Ability to develop effective, user-friendly interfaces, responsive web
design, and service design

Mobile Development: Knowledge of mobile apps that communicate with external
hardware and sensors

Hardware Engineering: Develop and install Wi-Fi™, Bluetooth®, and other connectivity
solutions, computer-aided design, micro-electromechanical systems engineering,
wireless sensor design, and quality assurance

Networking: Design, maintain, and optimize large-scale traffic across secure,
reliable, and redundant backbones that connect different destinations with knowledge
of typical wireless connections, EFID, and emerging wireless protocols

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