Lesson 6 of 10
Deduplicate with ROW_NUMBER without losing the truth
Choose a winning line with a complete and auditable rule.
28 minSQL Data Analyst
By the end of this lesson
- Set a duplicate key
- Write a deterministic order
- Keep rejected rows for review
SQL Essentials
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Deduplicate with ROW_NUMBER without losing the truth is part of the complete programme: 38 lessons, 62 verifiable exercises and 8 published guided projects.
- Complete content with explained examples
- SQL simulator and expected result
- Detailed answer, common mistakes and challenge