Technique and Application of Inquiry Optimized Based on Distributed Data Base System
Yao Bi-fen · Computer Knowledge and Technology · 2007
The distribution of distributed data base system and redundancy of data distributed has increased much complexity to the settling of enquiry. So the optimization for the settling of enquiry distributed seems particularly important. This article discuss the technique of the enquiry optimization on the view of enquiry policy selection according to my own working experience,and point to introduce the technique and application of inquiry optimized on the basis of relation algebra optimization algorithm that equivalence varied and semi-join operate.