Statistical estimators for relational algebra expressions
Wen‐Chi Hou, Gültekin Özsoyoğlu, Baldeo K. Taneja · 1988
Present database systems process all the data related to a query before giving out responses. As a result, the size of the data to be processed becomes excessive for real-time/time-constrained environments. A new methodology is needed to cut down systematically the time to process the data involved in processing the query. To this end, we propose to use data samples and construct an approximate synthetic response to a given query.