QUERY OPTIMIZATION IN A RELATIONAL DATABASE SYSTEM
Qian Hua Zhu · Computer Applications and Software · 1984
Query optimization is an important problem which should be considered in query processing.The problem of query optimization in a relational database system is discussed in this paper.The optimization method based mainly on the transformationsof algebraic expressions,the optimization method of query decomposition,the opti-mization method in processing directly multi-variable queries and the optimizationmethod of conjunctive queries are presented.At last we make a remark upon these fourtypes of typical optimization methods.