Natural Join Notation: R1 R2 Input Schema: R1(A1, …, An), R2(B1, …, Bm) Output Schema: S(C1,…,Cp) – Where {C1, …, Cp} = {A1, …, An} U{B1, …, Bm} Meaning: combine all pairs of tuples in R1 and R2 that agree on the attributes: – {A1,…,An} {B1,…, Bm} (called the join attributes) 15
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