likes(John, C++). likes(Bob, C#). likes(John, Java) likes(Bob, Lisp). likes(Julia, Python). likes(Bob, Python). Trace this code and show all details in order to find out the value of X in the following query: likes(Bob, X), likes(Julia, X).

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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likes(John, C++).

likes(Bob, C#).

likes(John, Java)

likes(Bob, Lisp).

likes(Julia, Python).

likes(Bob, Python).

Trace this code and show all details in order to find out the value of X in the following query:

likes(Bob, X), likes(Julia, X).

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