SQL Interview Questions

  1. Can you explain the difference between a clustered index and a non-clustered index in SQL, and give an example of when to use each type?
  2. How do you implement row-level security in SQL, and what are some best practices for implementing row-level security?
  3. Can you explain the difference between a materialized view and a non-materialized view in SQL, and give an example of when to use each type?
  4. How do you optimize SQL query performance with table partitioning, and what are some best practices for partitioning tables in SQL?
  5. Can you explain the difference between a correlated subquery and a non-correlated subquery in SQL, and give an example of when to use each type?
  6. How do you implement dynamic SQL in SQL, and what are some best practices for using dynamic SQL in a production environment?
  7. Can you explain the difference between a CTE (Common Table Expression) and a subquery in SQL, and give an example of when to use each type?
  8. How do you implement data warehousing and business intelligence (BI) solutions in SQL, and what are some best practices for implementing data warehousing and BI solutions in SQL?
  9. Can you explain the difference between a star schema and a snowflake schema in SQL, and give an example of when to use each type?
  10. How do you implement data archiving and data retention in SQL, and what are some best practices for implementing data archiving and data retention in SQL?
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