Need Help with SQL Query Interview Questions

[Rina0]

Hello,
I am currently preparing for SQL interviews and came across a fantastic resource that provides a list of SQL query interview questions.

While going through the questions, I stumbled upon a few that are quite challenging, and I'm struggling to come up with the most efficient SQL queries to solve them. I was hoping some of you with more experience in SQL could lend a helping hand or provide some guidance.

Here are a couple of the SQL questions that I find particularly tricky:

Find the second highest salary from the Employee table.
Calculate the total number of orders for each customer from the Orders table and display the result in descending order.
I have attempted to solve these problems, but I believe there's room for improvement. So, if any of you have any elegant SQL solutions for these questions or any other useful SQL tips, I'd greatly appreciate it if you could share them with me.

Feel free to add code snippets or pseudocode for the queries you propose. It would be immensely helpful for me to understand the logic and implementation better.

Thanks in advance.

[iteducation92]

Thanks for the very useful information. It will be very helpful for those looking for making a career in SQL or want to learn SQL.
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