3b3888e9be
Turns
π a,b,c(A) ∪ π a,b,c(B)
into
π a,b,c(A ∪ B)
if A and B are union compatible
Works with union, intersection and difference.
2 lines
103 B
Plaintext
2 lines
103 B
Plaintext
πname,skill(σ skill == 'Perl' (people⋈skills)) ∪ πname,skill(σ skill == 'C' (people⋈skills))
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