A duplicate check rule of type 'Basic matching' checks if the data doesn't already exist in the table, based on a combination of table fields.

Duplicate check rules of type 'Basic matching' are applied automatically when you manually enter or update a record.

If merging duplicates is enabled for basic matching, and duplicates are found, you can compare the duplicates and merge field values. To enable merging duplicates is for basic matching, in the Data quality studio parameters, on the General tab, set the Enable duplicate check using basic matching field to Yes.

This topic explains how to handle possible duplicates that are found if merging duplicates is enabled for basic matching.

Standard procedure

1.	Go to a page to which a duplicate check rule of type 'Basic matching' applies.
2.	Enter or edit a record.
3.	Click Save.
4.	If possible duplicates are found, automatically, the Duplicate records found page is shown.
	Review the possible duplicates that are found by the basic matching duplicate check.
5.	Sub-task: Merge field values of duplicate records.
5.1	You can merge field values of the found duplicate records to a chosen master record.
	In the Duplicates found section, click Proceed to merge.
5.2	The master record to which the field values are merged is shown in the Master record section. By default, the created or edited record is the master record. You can select another of the shown duplicate records as the master record. As a result, this record is shown in the master record section.
	For the desired record, select the Master record check box.
5.3	The duplicate check setup defines which fields can be merged. These fields are shown in the Duplicates found section, preceded by a 'merge' check box. Select the 'merge' check for each field value that you want to merge to the master record. You can only select one 'merge' check box for each field.
	Select the desired 'merge' check boxes.
5.4	Click Merge.
5.5	Click Yes.
6.	Close the page.

Notes

If the duplicate check rule Outcome field is set to Warning and a duplicate record is found, the changed or new record is saved. If you have merged field values to a master record, the found duplicate records are not deleted automatically. The main reason is that the found duplicate records can be referenced in other records. Therefore, if desired, you can delete the undesired records manually. Do so from the record page.