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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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What is CompTIA Cloud+ Certification

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What is CompTIA Cloud+ Certification
#What is CompTIA Cloud+ Certification:
The CompTIA Cloud+ certification is an internationally recognized validation of the knowledge required of IT practitioners working in cloud computing environments.

This exam will certify that the successful candidate has the knowledge and skills required to understand standard cloud terminology and methodologies to implement, maintain, and deliver cloud technologies and infrastructures (e.g., server, network, storage, and visualization technologies); and to understand aspects of IT security and use of industry best practices related to cloud implementations and the application of virtualization.

Related: Cloud Computing+Jobs

Cloud+ certified professionals ensure that proper security measures are maintained for cloud systems, storage, and platforms to mitigate risks and threats while ensuring usability. The exam is geared toward IT professionals with 24 to 36 months of experience in IT networking, network storage, or data center administration. It is recommended that CompTIA Cloud+ candidates have CompTIA Network+ and/or CompTIA Storage+ Powered by SNIA certification.

It is further recommended that Cloud+ exam candidates have familiarity with any major hypervisor technologies for server virtualization, though vendor-specific certifications in virtualization are not required.

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