Abstract: Methods, systems, computer-readable media, and apparatuses for providing schema definition generation and management to enable a relational query tool to access data in a non-relational database. The schema definition tool may sample a non-relational database to produce a sample set of a table of the non-relational database and may generate multiple linked virtual tables to represent arrays in the sample set as scalar values. The schema definition tool may then automatically generate a table definition for each real and virtual table of the non-relational database to produce a schema definition representing the structure of the non-relational database. A relational query tool may now use the schema definition to format relational queries or commands to access data residing in the non-relational database.