Can You Solve This? Oracle SQL Interview Question | 3-Day Purchase Pattern

🚀 Oracle SQL Interview Question – Real-Time Scenario

In this video, we solve a commonly asked SQL interview problem:
👉 Identify customers who made purchases on exactly three different days in the last month.

This is a real-world scenario used in:
- Customer behavior analysis
- Purchase pattern tracking
- Data analytics & reporting

🧠 Concepts Covered:
- Date filtering in Oracle SQL
- COUNT(DISTINCT) logic
- GROUP BY and HAVING clause
- Real-time SQL problem solving

📊 Problem Statement:
Given a purchases table with:
customer_id | purchase_date

👉 Find customers who made purchases on exactly 3 different days in the previous month.

🔥 Real-Time Use Cases:
- Customer segmentation
- Marketing campaign targeting
- Sales trend analysis
- Data warehouse reporting

💻 Tools Used:
- Oracle SQL

👉 Step-by-step solution explained clearly

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Видео Can You Solve This? Oracle SQL Interview Question | 3-Day Purchase Pattern канала Rajasekar Data Engineer