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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

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

The 5 Skills You need to Start Data Analytics Career

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Data analytics is the job role hot in demand in each organization. Digital skills such as Mobile development, Full-stack development, Data Science, and Cloud computing are successful because they are very user-friendly to the end-users. Digital devices enabled digital technologies to cause to generate more data. You need different kinds of tools to analyze data in different formats. You need the right tools. Else you cannot predict the user's mind. User search data is the source of big retail markets. Based on these search words, they start selling the products. The motto behind data analytics is to get the benefit all stakeholders. Let us take cloud computing the main advantage is cost-effectiveness and scalability. 5 Skills you need for data analyst job R Programming SAS Excel Tableau QlikView Top Magazines to read Analytics Insight Analytics Magazine Analytics India Magazine Related Posts R Vs SAS Top Differences 6 Top IT Skills that have Huge Demand in

Java in Digital Applications Real Usage

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Recently I found, some of my friends refreshing Java language skills. I asked them why. They told me many digital applications need proficiency in Java skill. Java is the top skill, and popular in customization of all the tools involved in digital applications.  From the above conversation, I can say that at least core Java everyone should be proficient. In addition to that, Java once upon a time popular as web development language. Since Java is being used in all modern applications.  Of course, there are many other popular languages. Those are Python and Scala.   Top List of  Java Applications Robotic process automation - Daily activities in any offices can be automated with Robotic process automation. Java is the language in this scenario to write backend scripts. Artificial Intelligence -Each AI application involves some sort of programming logic. Where it validates user input and sends back output. The backend logic often is written in Java. Full stack development