# Download

All code for the ddls, constraints and indices are available on our github. Each version of the Common Data Model is denoted by a release. The OHDSI community supports the database management systems (dbms) Sql Server, Postgresql, Oracle, Redshift, Parallel Data Warehouse, BigQuery, Impala, and Netezza. Included in each release is a folder for each dbms. After downloading, choose the folder for your specific system and you will see all necessary files. For example the Sql Server folder has the ddl, primary key constraints, indices, and foreign key constraints. In contrast, the redshift folder only has a ddl.

These sql scripts have been fully tested on Oracle, Sql Server, and Postgresql and the rest are generated using the SqlRender package. If run into any problems please let us know by creating an issue on our github.