Multi-source heterogeneous data acquisition and fusion method and device and storage medium

The embodiment of the invention provides a multi-source heterogeneous data collection and fusion method and device and a storage medium. The method comprises the steps that a user request is received; determining an optimal query processing strategy according to the identity parameter of the to-be-accessed data and the access mode of the to-be-accessed data; obtaining an optimization processing strategy according to the access mode of the to-be-accessed data; obtaining the target virtual table according to the optimal query processing strategy, and finding the target data source from a plurality of initial data sources according to the target virtual table and the query scheme; and according to the optimization scheme, determining a query range in the target data source, accessing the query range in the target data source through the search mode, and returning an access result. According to the embodiment, a data access method which does not concern data forms, related technical interfaces and data storage po