📊 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄𝗲𝗿: How do you find Duplicate Records in a table?

🙋‍♂️ 𝗠𝗲: Use GROUP BY with HAVING to filter rows occurring more than once:

SELECT column_name, COUNT(*) AS duplicate_count
FROM your_table
GROUP BY column_name
HAVING COUNT(*) > 1;

🧠 Logic Breakdown:

- GROUP BY column_name groups identical values

- HAVING COUNT(*) > 1 filters groups with duplicates


✅ Use Case: Data cleaning, identifying duplicate user emails, removing redundant records

💡 Pro Tip: To see all columns of duplicate rows, join this result back to the original table on column_name.

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