Hi I try to build a right schema for my table.
I have tuples {X_i, Y_j} and I have to answer to two kinds of queries:
Y_j getYvalue(X_i) : given a value X_i, return me the corresponding value
Y_j
X_i getYvalue(Y_j) : given a value Y_j, return me the corresponding value
X_i
The easiest way would be to define two tables : one with Keys {X_i} and the
second with Keys {Y_j}
Does it exist a better way?
Thanks!
Benjamin
