Question

Given the following schema: Catalog(sid, pid, price) (Line under sid and pid) Suppliers(sid, sname, phonenum) (Line...

Given the following schema:

Catalog(sid, pid, price) (Line under sid and pid)

Suppliers(sid, sname, phonenum) (Line under sid)

Parts(pid, pname, color) (Line under pid)

Write the following queries in Relational Algebra: “Find names of suppliers who supply a blue part that costs less than 120 dollars and a yellow part that costs more than 150 dollars

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