I have several lists in Sharepoint I'd like to link/view/query together, but I find it difficult to edit relational data with the same ease as could be done in e.g. an Access database (subforms, custom queries etc). I've been looking at related lists web parts, changing edit/view forms, creating infopath forms with repeating secions etc.
Does anyone have tips on good ways to get SP to work with this kind of data, without needing to implement custom web application with SQL backends etc?