Some examples relate to database systems for electronic spreadsheets. In one specific example, a system includes a relational database and a document database that is separate from the relational database. The system can retrieve structural data from the relational database, where the structural data describes a column configuration for a set of columns of the electronic spreadsheet, and where the structural data describes a row configuration for a set of rows of the electronic spreadsheet. The system can also retrieve cell data from the document database. The system can then generate the electronic spreadsheet based on the structural data and the cell data, such that the electronic spreadsheet has the column configuration and the row configuration defined in the structural data, and has the cell data positioned in a set of cells located at intersections of the set of rows and the set of columns.