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How do you avoid having duplicate data in a database?

Asked 7 months ago

We have been having tons of duplicate data, and it's starting to become a pain. Is there anything we can put in place to prevent a duplicate from being saved?

Eduardo Salas

Sunday, March 27, 2022

You can find and merge the identical values manually to avoid duplicate data. Another way around is to set up a unique index in Access. A unique index is a field in the database that demands a unique value for each entry. It doesn't accept the duplicate value and returns an error message.

To do so, follow these steps:

  1. Go to the Design view by right-clicking the table that contains the field.
  2. Select the field you want to have no duplicate values.
  3. From the 'General' tab, select 'Yes' for 'Indexed Property.'
  4. Hit the Save button to lock your changes.

Jesse Gray

Sunday, May 15, 2022



In the case of having duplicate data in a database, you can simply merge duplicate data as a single value, this will eliminate all duplicates from the database. You will need to configure the database to knock off duplicate data through warning signals to avoid collecting duplicate information. You can prevent data duplicates in a database by creating a unique index. The unique index will demand that each data in the indexed field is unique in value and properties. You can create a new index by setting up a data-definition query that creates a new index. This can be done using SQL view.

Lanny Sutton

Monday, September 05, 2022

You can have a unique clustered index on every table that contains a primary key column or any other field. A unique index will ensure that only one row can exist with the same value for a given column or field in any given table. Follow these 4 simple steps to get rid of duplicate data forever:

  1. Verify that all the SET options and view definition is accurate.
  2. Verify that both the base and view table have the same owner.
  3. Using the "WITH SCHEMABINDING" option, create the view.
  4. Now create your unique index on that specific view.




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