Translating SQL Into Relational Algebra Tree-Using Object-Oriented Thinking to Obtain Expression Of Relational Algebra
Silao XU, Mei HONG · International Journal of Engineering and Manufacturing · 2012
When we are translating SQL into relational algebra, we need a simple but flexible form to represent the data structure involved.As an interim result of the calculation, relational algebra tree combined with object-oriented model can gives us simple, intuitive notation allowing the query to be efficiently expressed and implemented at amazing ease.