This template is based on the fact customer_merge_log.

Customer Merge Event Log Lets you export the log of customer account merge event which includes both victim and survivor details. The template also supports, Audience filter based and customer segment bases filters.

To know more about account merge and its affect on both the accounts, see Change Identifiers & Account Merge Configuration in Member Care 

Measures

MeasureDimension
Auto Update TimeDate and time (in Unix timestamp) when the customer merge log is recently updated
Details-
Merge ReasonReason specified while merging account
Victim External IdExternal id of the victim account
Victim MobileMobile number of the victim account
Merge Event IdUnique internal id associated to the merge event

Dimensions

latest_updated_date, latest_updated_time, Date, Time, User, User Segments, merge by admin user, merge by till, victim user
customer_merge_log