A data retrieval apparatus includes a processor, a memory and a business intelligence circuit. The memory stores a data dictionary including presentation structure definition information for assisting input of a user terminal to issue a retrieval request compliant with a retrieval requirement, and retrieval request definition information for managing relevance between different retrieval requests. The business intelligence circuit assists input of the user terminal according to a presentation structure defined in the data dictionary to issue a retrieval request described according to the presentation structure, and outputs a retrieval result based on the retrieval request, the retrieval result being obtained from the databases, to the user terminal. The data retrieval apparatus associates retrieval results prepared in response to different retrieval requests with each other according to the retrieval request definition information.