<div dir="ltr"><div class="gmail_extra">"where" means, which function or which part of source code.</div><div
class="gmail_extra">Iwant to use that(function or part of source code), to produce the equivalence</div><div
class="gmail_extra">(basedon equivalence rules in attachment) Relational Algebra</div><div class="gmail_extra">for a
givenSQL query(Relational Algebra).</div></div>
