🔥 Oracle SQL MERGE Explained | Incremental Load (Insert + Update) | Real-Time Example| SQL | PySpark
In this video, you will learn how to use the MERGE statement in Oracle SQL to perform incremental data loading (UPSERT).
👉 Topics Covered:
• What is MERGE in Oracle SQL
• Real-time example (Target vs Source table)
• Update existing records
• Insert new records
• Complete SQL query explanation
• Interview tips and questions
💡 This concept is widely used in:
✔ Data Engineering
✔ ETL Pipelines
✔ Data Warehousing
✔ Incremental Loads
🎯 Perfect for:
• Beginners in SQL
• Data Engineer aspirants
• Working professionals preparing for interviews
📌 SQL Code Used:
MERGE INTO target_table t
USING source_table s
ON (t.id = s.id)
WHEN MATCHED THEN
UPDATE SET t.name = s.name, t.email = s.email
WHEN NOT MATCHED THEN
INSERT (id, name, email)
VALUES (s.id, s.name, s.email);
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📺 Channel: Rajasekar Data Engineering
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