This disclosure provides various embodiments of software for utilizing a common database layout. In one aspect, a first database table having a first layout and a generic index is accessed using a first instance of a query, and a second database table having a second layout and the generic index is accessed using a second instance of the query. Some implementations may have a generic index that consists of a globally unique identifier. Other implementations may have a generic index that is a combination of database table fields. In some implementations, the first and second database tables may be resident in a first data repository, and the software may access a third database table having a third layout and the generic index using a third instance of the query, wherein the third database table is resident in a second data repository.