Creating contact history tables for new audience levels
When you create a new audience level, you may need to create a table in the Campaign system table database to store contact history and detailed contact history for targets and controls in that audience level.
When you create these tables, you must create indexes on them. For example, if you create the INDIV_ContactHistory table for a new Individual audience level, you could create an index as follows:
CREATE INDEX XIE1INDIV_ContactHistory ON INDIV_ContactHistory ( IndivID )