My group and I are developing a multi agent system (MAS), a system that is supposed to conduct statistics on specific fields of the agents' databases using semantic search and ontology (the user chooses the fields to be considered).
For example, the user might want to know the number of people stored in the database that are male, over 20 years old, lives in NYC, blood type: A, and are single.
So I was wondering if there is a way to write the query in MySQL(MySQL 184.108.40.206) that returns the number of matching tuples (matches the user's selection and conditions) in the database, or if the jsc.jar in JAVA (java statistical classes) or any other JAVA jar can perform the required operation. I know that I should use the "count(*)" in the query, but I'm not sure how to build the "where" part of the query (that relies on the user's selection of fields) at runtime.
I'm looking for a way that a query builds itself (to be specific the "where" part) according to what the user chooses during runtime. Is it possible?