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Which of the following is not a valid binary operation in the relational algebra? a . natural join b . intersect c . union d
Which of the following is not a valid binary operation in the relational algebra?
a natural join
b intersect
c union
d cross product
e project
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Spatial Databases With Application To GIS
Authors: Philippe Rigaux, Michel Scholl, Agnès Voisard
1st Edition
1558605886, 978-1558605886
