Approximate query processing for database flexible querying with aggregates

摘要: Database flexible querying is an alternative to the classic one for users. The use of Formal Concepts Analysis (FCA) makes it possible turn approximate answers that those turned over by a DataBase Management System (DBMS). Some applications do not need exact answers. However, database can be expensive in response time. This time more significant when require calculation aggregate functions ("Sum", "Avg", "Count", "Var" etc.). Online aggregation enables user issue SQL query, see results immediately, and adjust processing as query runs. In this case, sees refining estimates final results. spite success which known method, until now, hasn't been integrated systems. article, we propose approach tries solve problem using (AQP). allow i) wrote contains linguistics terms, ii) observe progress their queries iii) control execution on fly. We report initial implementation online system.