Hi there! You may be interested in a sister project, IonDB - A key-value store for embedded devices. LittleD is a relational database for microprocessor devices, using as little as 1kB of RAM for most queries. LittleD supports SELECT-FROM-WHERE syntax, including inner joins, projections, and selections over arbitrary expressions. LittleD also has support for CREATE TABLE and INSERT statements. Only integers and fixed-width strings are supported at this time. In the future, query pre-compilation, network transmission, network relational operators, aggregation, and improved indexing are hoped to be implemented.