Abstract: In some embodiments, a system can instruct a processor to determine a temporal relationship among a set of search parameters for a longitudinal query, and to classify each search parameter from the set of search parameters with a discrete event from a set of events. The system can determine global search parameters for the longitudinal query based on each discrete event from the set of events, and can define a single-segment query for each discrete event from the set of events. The system can also define a multi-segment query based on each single-segment query defined for each discrete event from the set of events, and can query a set of database tables from a longitudinal database based on the multi-segment query to retrieve multi-segment query results. The system can also render the retrieved results in a user interface.