SQL Interview Question: Fill NULL with Last Non-NULL Value | Oracle SQL Explained
In this video, we solve a popular SQL interview question:
👉 How to fill NULL values with the last non-NULL value in Oracle SQL?
We walk through multiple solutions step by step:
✅ Using LAST_VALUE … IGNORE NULLS
✅ Using MAX() OVER window function
✅ Using Correlated Subquery
✅ Bonus: Recursive CTE approach
This is a must-know concept for anyone preparing for SQL interviews or working with real-world database problems.
💡 If you know another approach, share it in the comments so we can learn and grow together!
And if you find any mistakes, please correct me — we’re all here to learn 🙌
If you’re preparing for SQL / Database Developer / Data Analyst / Data Science / Data Engineer job interviews, don’t forget to:
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