  In this paper we introduce the SchemaDB data-set; a collection of relational
database schemata in both sql and graph formats. Databases are not commonly
shared publicly for reasons of privacy and security, so schemata are not
available for study. Consequently, an understanding of database structures in
the wild is lacking, and most examples found publicly belong to common
development frameworks or are derived from textbooks or engine benchmark
designs. SchemaDB contains 2,500 samples of relational schemata found in public
repositories which we have standardised to MySQL syntax. We provide our
gathering and transformation methodology, summary statistics, and structural
analysis, and discuss potential downstream research tasks in several domains.
