Top SQL Interview Questions

Top SQL Interview Questions

Top SQL interview questions for Java Full Stack Developers

  1. How to join 3 tables?
  2. Find the 2nd highest salary from the employee Table.
  3. How to find duplicate records?
  4. Find the Employee who has just completed 10 years in the company?
  5. How to find current date using SQL query?
  6. Prepared Statement vs. Callable Statement?
  7. What is indexing in Database?
  8. How to swap the content of column with another column?
  9. How to remove duplicate records?
  10. Find the nth highest Salary from Employee Table using CTE?
  11. Can a foreign key have a duplicate value?
  12. Show first 3 records of each category from employee table.
  13. Top command works in which DB oracle or mySQL?
  14. Union vs. Union all?
  15. What is aggregate function?
  16. Use of group by clause, having keyword, count, avg.
  17. Can SQL views be updated?
  18. How does recursive CTE works?
  19. Delete vs. Drop vs. Truncate?
  20. Functions vs. Stored Procedure?
  21. What is Procedures, cursors and triggers?
  22. What is auto increment?
  23. Different types of joins and its use case?

If you have come up with any other SQL questions in interview Please add in the below comment section.

4 Replies to “Top SQL Interview Questions”

  1. Hi There,

    Allow me to show my gratitude bloggers. You guys are like unicorns. Never seen but always spreading magic. Your content is yummy. So, satisfied.

    As per the following article, we have to encapsulate a SP if the setting ‘remote access’ is not enabled on the DB server (generally it is not recommended to activate this setting).
    An index is an optional structure associated with a table to have direct access to rows, which can be created to increase the performance of data retrieval. Index can be created on one or more columns of a table.
    https://docs.microsoft.com/en-us/sql/database-engine/configure-windows/configure-the-remote-access-server-configuration-option?view=sql-server-2017
    normal way:
    Declare @id int = 1
    EXEC SQL01.TestDB.dbo.proc_test @id;
    Encapsulated way?
    EXEC(N’TestDB.dbo.proc_test’) AT [SQL01];

    Excellent tutorials – very easy to understand with all the details. I hope you will continue to provide more such tutorials.

    Thank you,
    Lili

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