Question: Relational Model 1. Given R1 and R2 compute if possible: R1 ID 0 R21 ID | B | D 0 | BO | DO |

Relational Model

Relational Model 1. Given R1 and R2 compute if possible: R1 ID

1. Given R1 and R2 compute if possible: R1 ID 0 R21 ID | B | D 0 | BO | DO | EO A1 B1 A2 B3 2 B99D2E2 2 R1UR2 (union): R1xR2 (Cartesian product) R14R2 (natural join): iR2nR1ID-R2.ID (left outer join)

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