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- How do you avoid including duplicate values in a query result?
- Why does my query have duplicates?
- How do I prevent duplicates in SELECT query?
How do you avoid including duplicate values in a query result?
The keyword DISTINCT eliminates duplicate rows in the result.
Why does my query have duplicates?
Query is a way to group records; it is not a reporting tool. The query output simply shows you whether the record belongs in the query. If a field with a one-to-many relationship is in your filters, output, or sort, the record will appear multiple times-- once for each time the record meets the criteria.
How do I prevent duplicates in SELECT query?
The SQL DISTINCT keyword, which we have already discussed is used in conjunction with the SELECT statement to eliminate all the duplicate records and by fetching only the unique records.
