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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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Career Opportunities in Mobile App Development

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Mobile application development one of the hot skills in the digital age. The use of mobile phones and the internet create many job opportunities in the area of mobile application development. The following skill set is required to enter into mobile application development.

mobile apps career path

Mobile Development Career Paths

  1. Applications development in multiple platforms.
  2. User interfaces design for mobile apps.
  3. Marketing for apps which already developed.

1.  Development Career

The opportunities are more to develop mobile applications. There are a lot of creative opportunities you can find in this career path. 

You will get a chance to develop applications for Android, IoS, and Windows.
Nowadays the apps are intelligent and smart. The smartness means those should have user-friendly to the end-users.


Mobile App Development

2.  User Interface Design

The UX or user experience for mobile apps very much needed to be a successful app. The popularity of an app directly related to how well it is designed.

Best applications generate revenues for the owners and jobs are created for continuous improvement.


User Interface

 3. Marketing of Apps

Skill in marketing very much needed to generate revenues to the owner.  Develop once and sell it to multiple owners generates revenues. Your career progress depends on the level of your marketing skill. The marketing skill you gained makes you earn more once you start selling apps.

The marketing section has multiple roles. They slowly can move into an advertisement for that mobile app.

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