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. Given a table T with at least two attributes A and B, we say that A - B (A functionally determines B, or B is functionally dependent on A) iff it
. Given a table T with at least two attributes A and B, we say that A -> B (A functionally determines B, or B is functionally dependent on A) iff it is the intent of the designer that for any set of rows that might exist in the table, two rows in T cannot agree on A and disagree on B.