How Can I Delete Duplicate Rows from a Table Without Creating a New One?

Deleting Duplicate Rows From a Table Without Creating a New One

You have a table with duplicate records that you wish to remove without creating a new table. This can be achieved through the following method:

Start by assuming the table includes a unique ID field. Identify the duplicate records by comparing the values in all fields except the ID, such as L1_name, L2_name, and so on.

Once you have identified the duplicates, proceed to delete all records that match the duplicate values but have an ID different from the minimum ID within that group of duplicates.

Illustrating this concept with a query:

Remember to substitute "Table" and "ID" with the actual table name and ID field name. Additionally, the list of fields in the GROUP BY clause should include all fields except the ID.

This query will efficiently delete duplicate records without requiring the creation of an additional table. It should be noted that the performance may vary based on the number of fields and rows involved.

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