TOP 10 SQL Concepts for Job Interview

1. JOINs (Inner/Left/Right/Self)
2. Group By and Order By
3. Aggregate Functions (sum/avg/max/min)
4. Union and Union All
5. Date and Time processing
6. String processing
7. Window Functions (Partition by)
8. Subquery
9. View and Index
10. Common Table Expression (CTE)

SQL Join is a very important concept for any Data Science or Analytics Job Interview as well as day to day work.

Please refer to this 3 page document for understanding different SQL Join types.

Once you have understood the concepts, please go ahead and practise it with some actual or sample data tables.

(Document Credit: Steve Stedman)

I’m sure SQL will help you a lot in your Data Science journey and make you an awesome Data Scientist. All the best! 👍🏻

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import java.util.PriorityQueue;
public class Main
{
public static void main(String[] args) {
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p.add(3);
System.out.println(p.poll());
System.out.println(p.offer(4));
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p.remove(2);
System.out.println(p.peek());
System.out.println(p);
}
}

How to Learn Something New Every Day as a Software Developer
https://www.freecodecamp.org/news/learn-something-new-every-day-as-a-software-developer/