How do I remove duplicates? [Service wiki]

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====== How do I remove duplicates? ======

If an email is sent to more than one target group, it is necessary to check the two target groups for duplicates. Only then is it guaranteed that each user only receives one email.

===== Selecting the target groups =====

At //Addresses > Doublet Tool//, you can select two or more target groups that are supposed to be compared to each other. 


{{:en:addresses_doublet_filter_1.png?nolink&800|}}

By using the doublet filter tool, all overlaps of different target groups can be calculated, saved, or excluded. The base for the matching is the client-specific unique attribute (default: email; alternative: client number/custID).\\ 

===== Defining the sequence =====

In the example shown here, three target groups shall be compared to each other. First, the order of alignment has to be set. To do so, move the elements via drag & drop into the right position. On top of the list has to be the target group, which represents your base. The target groups below are filtered out of the top one.

{{:en:addresses_doublet_filter_2.png?nolink&800|}}

===== Executing the comparison =====

With the button //Calculate doublets//, the respective duplicate-free amounts are computed. The column //Over all target groups// shows the //total amount// of addresses in the original target groups. The column //Contained in previous set// lists all doublets, while the column //NOT contained in previous set// displays the duplicate-free amount.  

{{:en:addresses_doublet_filter_3.png?nolink&800|}}

===== Saving the target groups =====

All grey areas can be saved as a target group, which can then be found at //Addresses > Lists//. When saving the target groups, you have the option to limit them. To do this, enter any subset of the generated target group amount in the field provided. The limitation is carried out on a random basis of addresses.

{{:en:addresses_doublet_filter_4.png?nolink&500|}}

Stored target groups are marked green. 

{{:en:addresses_doublet_filter_5.png?nolink&800|}}


{{tag>duplicate_matching doublet_tool target_groups }}
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