In this article, we will understand how to delete duplicate rows and records from a table using Common Table Expression (CTE) in SQL Server. Let’s begin. Firstly, we need to create a sample table and see how CTE works on that. Now, let’s create an Employee table and see how it ...
Microsoft Knowledge Base has an article KB139444 on how to delete duplicate rows from a table that has no primary key. Though it works, it's quite an overkill to delete duplicate rows with grouping, temporary tables, deleting and reinserting. With SQL Server 2005 and above, there is much ...
When using INTO to copy a table, all rows from your query will be used to populate the new table you are creating unless you specify a false condition in the WHERE clause of your query. In the solution provided, the expression “1 = 0” in the predicate of the query causes no rows ...
I was hoping that there was a function that would sort through the spreadsheet and find all duplicate rows and then delete all occurrences of the row weather it be in rows 1 and 2 or rows 501 and 502. Thankyou Does your data reside in a single column? If so, you can readily come up...
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Ordered and organized deletes with SQL CTEs Since common table expressions can assist us with organization of data, especially organizing data in groups within larger groups, we can apply this feature with removing duplicate values and removing values within smaller groups of data. For o...
No matter what you do, it is impossible to retrieve both delete rows and access it from the same table in a single SQL query. It is necessary to use at least two queries. In the past, I have accomplished this task using a three-step approach. The first step involves creating a tempor...
Deleting Duplicate Rows when the table doesn’t have a primary key. This article gives a quick way of deleting duplicate records from a given table, that doesn’t have a primary key.
After changing my query logic, i was able to duplicate the same problem that you are seeing. I think that this is actually a bug. I will pass this on to the Editor team. However, there is a workaround for this issue. You can use the EditOperation Delete method...