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 ...
1. would like to delete all duplicate rows by some SQL statement DELETE FROM version WHERE rowid NOT IN (SELECT min(rowid) FROM version GROUP BY major, minor, date); OK, fine. Worked perfectly. 2. defend myself against this happening again, that is, major,minor and date may only occur...
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 Create Table As Select (CTAS), 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. In the solution provided, the expression “1 = 0” in the WHERE clause of the query causes no rows to ...
If there are multiple duplicates for even a few SKU_Num values, you're doing multiple scans (full table or full index) to get all the dups out. You might reconstruct the SQL to not use a looping construct if there are lots of duplicate rows for each SKU_Num ...
in go out help I can sort the list so that all occurrences are together but I would still have to go through the spreadsheet A:Z to find them. 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...
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...
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Duplicate rows of data Malformed or incomplete data Erroneous data Fixes to ETL or LDM have changed the data Basic Approach Typically, a single ETL graph maps to a single dataset in a workspace, so you can design deletion strategies on a per-dataset b...