The question im suppose to answer is, Create a table that results from adding UNION ralational operator to BOOTH and MACHINE.
This are the tables.
Can someone show me the relational algebra equation for this answer. I'm lost :((
You could really just alias the names of the columns from both tables so they are the same.
select Machine_Product as Booth_Product, Machine_Price as Booth_Price from MachineTable union select Booth_Product, Booth_Price from BoothTable