;with customerDups as ( SELECT customer.CUSTOMERID as CUSTOMERID,customer.NAME as NAME,customer.STARTDATE as STARTDATE, customer.LASTUPDATED as LASTUPDATED,customer.MODIFIEDBY as MODIFIEDBY, CASE WHEN customerAttribute.ISMIGRATED is null and customerAttribute.TYPE = 'EDIT' THEN 'IN-PROGRESS' ELSE '' end as STATUS, CASE WHEN customer.LOCKEDBYUSER is NULL THEN '' WHEN customer.LOCKEDBYUSER is not NULL THEN customer.LOCKEDBYUSER end as LASTUSER, ROW_NUMBER() OVER(PARTITION BY customer.CUSTOMERID ORDER BY customer.CUSTOMERID) as customerRank from LM.Customer customer LEFT OUTER JOIN LM.CUSTOMER_ATTRIBUTE customerAttribute ON customer.CUSTOMERID = customerAttribute.CUSTOMERID WHERE customer.ISACTIVE='T' ) DELETE FROM customerDups where customerRank > 1;
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