Add general intro

thehyve · Mar 28, 2024 · e772fb0 · e772fb0
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 # Usage
 
+omop-cdm provides SQLAlchemy declarative table definitions that can be used
+to interact with an OMOP CDM via Python. This can be to more easily create all tables in
+your database, but also to use them for data manipulation
+(see [SQLAlchemy data manipulation](https://docs.sqlalchemy.org/en/20/tutorial/orm_data_manipulation.html))
+
 ## Preparation
 
 Before creating the OMOP CDM tables, the following must be available: