data generator for SQL Server?

Hi,

is there any addin which can simplify the management of data in a SQL database project?

I have some reference data to load in the database, so a bunch of "insert into" commands.

but I' looking for a tool to manage this.

I do not want to test if the row is already in the database before violating a key.

I want to update changed records

etc...

I do not want to maintain this myself, like SSDT can compare the schema and deploy the changes only, I expect a tool to do the same process at the data level.

any guide? tool? help? :)

else I'll manage this by TSQL codes...