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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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3 Top AWS benefits to the Organization

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In this post, I have explained benefits for an organization while using AWS. You can choose the AWS as a career option since a lot of openings are there in the market.

To be specific, Cloud storage is an online storage facility which is given to users so that they can use external servers to store or host their data.
  
Most of the business organizations need large storage capacities. Moreover, businesses need storage capacities to be clubbed with mobility. Due to this, Cloud computing has become very popular in the last few years.

Amazon Web Services or AWS makes sure that anything digital is securely stored and available anywhere. Due to the same reason, Amazon Cloud computing is the most widely used and popular Cloud service on the Internet. 

In this post, we will tell you about some general benefits of using Amazon Web services. We will tell you how Amazon Cloud computing helps your organization.

Benefits of using Amazon Web Services

Amazon Web services provide a lot of benefits to a business organization. These benefits allow you to maximize your productivity and enhance efficiency. Here is a list of some of the common benefits provided by Amazon Cloud computing.
  1. Minimal Costs - Most of the time, upfront costs of using Amazon Web Services are nil or negligible. Therefore, Amazon Web services are cost-effective for business organizations. Most of the service providers just require a monthly subscription fee. Moreover, this fee is in-line with actual usage. This means that customers have to pay for only what they use or need. In fact, most of the companies consider this monthly subscription as an operational expense. This actually acts as a financial incentive.
  2. Round the Clock Support - Amazon provides round the clock support and maintenance services. Round the clock services ensure that you have help whenever you need. Hiring your own staff can be an unnecessary cost. Most of the service providers offer technical support so that technical experts can easily troubleshoot any problem that your organization might face at any time.
  3. High Availability - When you are using Amazon Web services, you will be able to access your data from anywhere at any time. Amazon Web services make sure that your data storage and retrieval needs are completely simplified. AWS is the next big phenomenon in Information Technology. Amazon Cloud computing empowers your business organization to provide a wide array of services such as website hosting, eCommerce, customer relationship management and application hosting. 

Service Providers

Amazon Web services provide the boost, which your business needs to grow and have an edge over your competitors. 

There are many service providers in the market offering Amazon Cloud Services and Amazon Web Services (AWS) at affordable prices. Amazon Cloud computing can be very beneficial for your business organization.

The Bottom Line

Since AWS has many features, in the market there are many job opportunities.

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