Question: 7 . ( 2 points ) Write a relational algebra expression that results in the pizzerias that may, possibly, be eaten by males over the

7 . (2

points

)

Write a relational algebra expression that results in the pizzerias that may, possibly, be eaten by males over the age of

20 .

Hint: this should be based on the types of pizza they eat. You may use any of the following operators, though not all are necessary: selection, projection, natural join, difference.

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