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Given the following relational database schema: R= A B 12 22 Provide the result of these relational algebra expressions: S= B C 12 21 33

Given the following relational database schema:

R= A B

12 22

Provide the result of these relational algebra expressions:

S= B C

12 21 33

RS, RS, R S, R S, RnS, RS

The last one may show some incompatibility. Use the Rename operator to find the solution.

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