# Migrating IO Database functions to tHMap Multi-Output Database Connections

tHMap supports multiple output connections. If you have previously created a Job using the IO Database functions, you can migrate these into using the multi-output feature.

## Prerequisites

* You have previously created Talend Data Mapper Structures from a database connection.
* You have a Talend Data Mapper Map that uses a wrapped multi-table structure with a DatabaseInsert or DatabaseUpdate IO/Database output function for each table.
* If you wish to use the attached sample project from the Downloads tab, you need to create databases using the sample database scripts in your local server.

### In this section

* [Updating the Map](https://help.qlik.com/talend/en-US/components/8.0/data-mapping/updating-map)
* [Migrating the Job](https://help.qlik.com/talend/en-US/components/8.0/data-mapping/migrating-job)
* [Syncing Database Table Schemas](https://help.qlik.com/talend/en-US/components/8.0/data-mapping/syncing-database-table-schemas)