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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

5 Top Digital Skills You need in Future

Before you perform work in a new-age digital job, focus on the real skills you need to learn.


real digital skills

1. Automate Repeated Tasks

  • Take the best example of saving all the emails from google account. That is after sending an email that should save in an Excel document.
  • This is one kind of Skill. So learning technologies to create Tools for this kind of automation provide you a lot of job opportunities.

2. Automate Stop Function

For example, work and home both are different. After certain hours the access to the Company network should be stopped. So that you can focus on your Home duties. Here you should have tools to do this kind of activity.

3. Data visualization

How to present data in a user-friendly way is the topmost digital skill. Nowadays there are many tools present. The Best example is Tableau. You can present the data in a user-friendly way.

4. Working Ability in Cloud Environment

For example, the olden days' servers are complex to migrate and move from one area to another. Cloud computing helps you to ease your job. You can move anywhere easily across the globe. Cloud servers really helpful. Learning Cloud computing shows a better career.

5. Ability to Use Modern Communication Channels

You can use Smart Phones, Social media, WhatsUp, Video conference, Voice calls, Internet-connected phones, to communicate with remote clients. You need to know how to use all these channels.


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