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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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Top Paid Software Jobs

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There are eight Software jobs. Those are hot in demand at the same time they pay more package for you.
it’s normal for your job hunt to take a few months these days.
-From What color is your parachute

1. Business Intelligence Architect

The primary responsibility of the business intelligence architect is data standards and procedures; warehousing; design and development of logical and physical data models and databases; distributed data management; information management functions.

The business intelligence architect designs, develops and enforces standards and architecture for installing, configuring and using business intelligence applications for the purpose of directing and managing the organization. The role usually requires a bachelor's degree and at least some experience in a BI role.

Salary:$81,200

2. ASIC Design Engineer

The role produces application-specific integrated circuit (ASIC) designs and modifications by identifying design objectives and issues; researching and developing ASIC engineering techniques and approaches; verifying and validating designs; maintaining documentation; and mentoring team members, if applicable.

The role usually requires a bachelor's degree and experience with general ASIC designs, concepts and usage.

Median Pay: $83,300

3. Solutions Architect

While the title might seem vague, a solutions architect (SA) plays a key role in the software development lifecycle: in the conversion of the product, application or solution requirements taken from the business or customer into an architecture and design that will become the blueprint for the solution being created.

This conversion is based largely upon the previous design patterns that the solutions architect has been involved with in the past through reading and staying abreast of the latest techniques, or through personal experience.

The role requires a bachelor's degree or equivalent experience.

Median Pay: $91,500

4. Software Architect

A software architect (SA) is responsible for the initial design and development of new software or extensive software revisions. The software architect defines product requirements and creates high-level architectural specifications, ensuring feasibility, functionality and integration with existing systems/platforms for internal use or for customers.

The role requires a bachelor's degree and, while still considered an entry level position, a solutions architect may be expected to have an advanced degree in area of specialty and may manage or guide other developers through the project to completion.

Median Pay: $94,100

5. Data Scientist, IT

Also known as "the sexiest job in IT," a data scientist's role is to use predictive analytics and machine learning experience to extract insight and actionable information from a firm's data stores. The role is fairly new and still evolving, but requires a bachelor's degree and at least familiarity with data mining, structured data modeling and predictive analytics.

Median Pay: $97,600

Middle Level

6. Principal Software Engineer

Principal software engineers are in charge of most of the technical aspects of an organization's software projects. Their primary function is scaling software projects efficiently while maximizing performance and minimizing costs. 

They also oversee development teams and coordinate strategies to make sure the technologies are interconnected and product lines are working smoothly. Principal software engineers focus on best practices and standards of design, application requirements and proper maintenance. Engineers in this role often manage teams of developers.

A bachelor's degree in computer science is usually the minimum educational requirement, although a (CSDP) Certified Software Development Professional certification along with hands-on experience in a previous position is also generally accepted.

Median Pay: $133,000

7. Data Scientist, IT

The role so nice, it appears on our list twice. As stated before, a data scientist's role is to use predictive analytics and machine learning experience to extract insight and actionable information from a firm's data stores. In a mid-level role, data scientists could be required to have software engineering experience, as well as higher-level strategic thinking and communication skills to more accurately make the case for business action based on the results generated by machine learning algorithms and insight gained from data mining.

The role is fairly new and still evolving, but requires a bachelor's degree and extensive experience with software development, data mining, structured data modeling and predictive analytics.

Median Pay: $134,000

8. Scrum Coach

The scrum coach role teaches and coaches all agile software development best practices and Scrum adoption to an IT organization or an agile development environment. Ideally, a scrum coach will have extensive experience with an agile development environment and will use his or her broad experience to help businesses adopt best practices as related to an agile framework.

Most scrum coaches have a bachelor's degree and experience in software development, engineering or architecture. While there is a specific scrum coach certification, experience and previous demonstrable success is most often used as criteria for hiring.

Median Pay: $151,000

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