Consider a relation representing the present position of molecules in a closed container. The attributes are the ID for the mole
cule, the X, Y, and Z coordinates of the molecule, and its velocity in the X, Y, and Z dimensions. Refer to the X, Y, and Z coordinates as PX, PY, and PZ respectively, and the X, Y, and Z velocities as VX, VY, and VZ respectively.
a) What functional dependencies do you expect to hold?
b) What are the keys?
c) Other than the keys list three superkeys.
d) Other than the keys how superkeys are there?
a) What functional dependencies do you expect to hold?
b) What are the keys?
c) Other than the keys list three superkeys.
d) Other than the keys how superkeys are there?
1 answer:
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