How to Remove Duplicates in SQL (Without Losing Data)
In this video, I explain how to remove duplicates in SQL without deleting entire rows.
Many beginners make the mistake of using DELETE, which removes the whole row. But what if you only want to clean duplicate values in a column? 🤔
In this video, you’ll learn:
Why duplicates are not always a problem
Which columns should be unique (Email, ID, etc.)
How to use ROW_NUMBER() to identify duplicates
How to replace duplicate values with NULL
Why using non-unique columns can give wrong results
Best practice using a unique column like emp_id
This is a must-know concept for SQL beginners and interviews #SQL #sqltutorial #learnsql #sqlforbeginners #datacleaning
#sqlqueries #dataanalytics #programming #coding