Any one can suggest, to write the event log to the text file. Its kind of a alerting. Already a service for alerting is there via email. Same concept to do the log to text file.
Relational model organizes data into one or more tables (or "relations") of columns and rows, with a unique key identifying each row. Rows are also called records or tuples.
Learn more on relational data model.
InterSystems Data Platform (IDP) supports relational tables as part of the multi-model storage concept. IDP provides SQL and API access to relational tables.