This book constitutes revised selected papers from two VLDB workshops: The International Workshop on Polystore Systems for Heterogeneous Data in Multiple Databases with Privacy and Security Assurances, Poly 2022, and the 8th International Workshop on Data Management and Analytics for Medicine and Healthcare, DMAH 2022, which were held virtually on September 9, 2022.The proceedings include 3 full papers each from Poly 2022 and from DMAH 2022.DMAH deals with innovative data management and analytics technologies highlighting end-to-end applications, systems, and methods to address problems in...