Illustrates a method for removing duplicate records from a table.

1) If the table does not have a primary key, add an autonumber field. It is essential that the table have a unique field. For example, copy Chains table, add a field called ChainID and make it an autonumber and the Primary Key.

2) Create a delete query like qdelRemoveDuplicatesFromChains2: DELETE * FROM Chains2 AS E WHERE E.ChainID > (SELECT MIN(X.ChainID) FROM Chains2 X WHERE E.Chain = X.Chain);

3) Run the delete query/