How to eliminate duplicate values based on only one column of SQL?

How to eliminate duplicate values based on only one column of SQL?

From your example it seems reasonable to assume that the siteIP column is determined by the siteName column (that is, each site has only one siteIP ). If this is indeed the case, then there is a simple solution using group by:

How to delete duplicate records in Oracle PL / SQL?

Group by operation should be on the columns which identify the duplicates. 2. Using self-join 3. Using row_number () 4. Using dense_rank () Here you can use both rank () and dens_rank () since both will give unique records when order by rowid. 5. Using group by This technique is only applicable in few scenarios.

How to remove duplicates in the sitename column?

SELECT sites.siteName, sites.siteIP, history.date FROM sites INNER JOIN history ON sites.siteName = history.siteName ORDER BY siteName,date How can I remove the duplicates in siteName column? I want to leave only the updated one based on date column.

How to delete duplicate records in Stack Overflow?

When duplicate records are deleted, the record with the lowest value in it’s identity column will be maintained. Once this is complied, you can delete all your duplicate records by running the proc. To delete dupes without defining a desired primary key use this call: Thanks for contributing an answer to Stack Overflow!

Is there a way to remove duplicates from a common table?

The magic of common table expressions. If you’re looking for a way to remove duplicates, yet you have a foreign key pointing to the table with duplicates, you could take the following approach using a slow yet effective cursor. It will relocate the duplicate keys on the foreign key table.

How is duplicate attribute used in identity synchronization?

Also, since the export for this object has succeeded, the sync client does not log an error and does not retry the create / update operation upon subsequent sync cycles. This is a multi-valued attribute that is used to store the conflicting attributes that would violate the uniqueness constraint should they be added normally.

What happens when duplicate attribute conflict is handled?

When an object with a duplicate attribute conflict is handled with this new behavior a notification is included in the standard Identity Synchronization Error Report email that is sent to the Technical Notification contact for the tenant. However, there is an important change in this behavior.

How can I get rid of duplicates in datamartist?

To resolve duplicate keys, Datamartist scans the data, and allows you to select keys and experiment- as many as you like (doing the concatenation trick that I described above automatically) and informs you which keys are duplicate, and shows you the duplicates for the various key combinations.