Welcome to the Jazz Community Forum
migration from SQL Server to Derby
One answer

Hi,
you really should use Derby only for test repositories. This help topic talks about changing the Database vendor: http://pic.dhe.ibm.com/infocenter/clmhelp/v4r0m1/topic/com.ibm.jazz.install.doc/topics/t_server_rename_movedb_newhw.html . You basically have to export the databases with repotools, change the DB connection and import your data back into the new DB.
you really should use Derby only for test repositories. This help topic talks about changing the Database vendor: http://pic.dhe.ibm.com/infocenter/clmhelp/v4r0m1/topic/com.ibm.jazz.install.doc/topics/t_server_rename_movedb_newhw.html . You basically have to export the databases with repotools, change the DB connection and import your data back into the new DB.