Relational database of published performance-based earthquake engineering and probabilistic seismic demand analysis results for mid-rise buildings. The database schema is organized based on building taxonomy information and prioritizes structural engineering use cases including comparison of alternative structural systems in early building design and regional seismic portfolio risk analysis. Data provenance, use cases, and sample queries are available in the accompanying manual, as well as two interactive Jupyter notebooks. A full description of the data provenance and schema design is provided in a related manuscript: Zaker Esteghamati, M., Lee J., Musetich M., Flint M. M., `INSSEPT: An open-source relational database of seismic performance estimation to aid with early design of buildings.'