a most general unifier (if one exists) of the following pairs. P(y,a,b,y) and P(c,f,g,f) where a and b are constants, and f,g,y are variables. P(f(x),r(x),c) and P(w,r(q),q), where c is a constant, and x, w, q are variables
a most general unifier (if one exists) of the following pairs. P(y,a,b,y) and P(c,f,g,f) where a and b are constants, and f,g,y are variables. P(f(x),r(x),c) and P(w,r(q),q), where c is a constant, and x, w, q are variables
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Find a most general unifier (if one exists) of the following pairs.
- P(y,a,b,y) and P(c,f,g,f) where a and b are constants, and f,g,y are variables.
- P(f(x),r(x),c) and P(w,r(q),q), where c is a constant, and x, w, q are variables.
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