Look into `cascade` Here's a related thread
https://groups.google.com/forum/#!searchin/sqlalchemy/cascade|sort:date/sqlalchemy/eIOkkXwJ-Ms/JLnpI2wJAAAJ -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.