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need asap, thanks Symbols for Relational Algebra Expressions and Other Symbols Symbols for relation schemas: R. S. T Symbols for relations: R, S, T Symbols

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Symbols for Relational Algebra Expressions and Other Symbols Symbols for relation schemas: R. S. T Symbols for relations: R, S, T Symbols for Relational Algebra operators: u,,,,,,,,+,,,,,,, Symbols for logical connectives: ,v, Symbols for comparison predicates:

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