1. A system for performing relational algebra operations on a DNA digital data storage, the system comprising: a first chamber containing a liquid suspension of a plurality of DNA molecules each encoding at least one row from a table of one or more tables in a relational database; a controller configured to receive a series of instructions for manipulating the DNA molecules, wherein the instructions correspond to a relational algebra operation; and an automated system configured to move a volume of liquid from the first chamber to a second chamber in response to the series of instructions from the controller.