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title: "Custom Target Database Schema using Table Maps"
canonical: "https://docs.perspectium.com/space/gold/1265310/Custom%20Target%20Database%20Schema%20using%20Table%20Maps"
format: markdown
---
By default, data replicated from existing tables will automatically create the same schema at the replicated database. The targeted database schema of replication needs to be flexible and customized in certain situations, such as:  An existing schema that the replicated data need to fit in A need to rename the field names or transform the field values using script at the source The resulting field types need to be modified to a specific type or field length Customizing target database schema can all be done by using  table maps  in your  dynamic share  or  bulk share .  Prerequisites   You will need to   install DataSync for ServiceNow ,  run the Finish Install scripts , and   set your initial Perspectium & Replicator properties . Procedure To customize your  target database schema  using  table maps , complete the procedures below:  Similar topics Contact Perspectium Support US:  1 888 620 8880 UK:  44 208 068 5953 support@perspectium.com