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How can we avoid duplicate records in SQL while joining two tables?
The keyword DISTINCT is used to eliminate duplicate rows from a query result: SELECT DISTINCT FROM A JOIN B ON However, you can sometimes (possibly even ‘often’, but not always) avoid the need for it if the tables are organized correctly and you are joining correctly.
How do I prevent duplicate rows in inner join?
Select column values in a specific order within rows to make rows with duplicate sets of values identical. Then you can use SELECT DISTINCT to remove duplicates. Alternatively, retrieve rows in such a way that near-duplicates are not even selected.
How to avoid duplicate rows in a multiple table join?
In short, instead of 6 rows it should only show 3 rows. IMP : There might be a delay in posting replies due to time difference (GMT +2:00) and Friday’s Holiday instead of Sunday. If you are pulling data from the three tables, there is no way you can get just three rows if the combinations are different.
Why is MY SQL query returning Duplicate results?
I recently reviewed a SQL query that was returning duplicate results. Since I expected, and needed, a single result from the query this was a problem. Here’s an explanation of why this bug occurred, and several different ways it can be resolved.
How can I get rid of duplicates in my query?
My first attempt to remove the duplicates was to add the DISTINCT keyword to my query, but that didn’t fix the problem – I was still seeing duplicates. As I was looking at the result set more closely I realized that the problem was in how the query was structured and the columns that it was returning in the results.
Is it possible to return duplicates in Excel?
Looking across the result set, we can see that the “duplicate” results are not actually duplicates – the same user is being returned with multiple categories, making each row unique. So if we only want to return one of each user, how do we do it?