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A unique constraint is used to randomize a group of variables such that no two members of the group have the same value. | #dc

A unique constraint is used to randomize a group of variables such that no two members of the group have the same value.

A unique constraint is used to randomize a group of variables such that no two members of the group have the same value.

A unique constraint is used to randomize a group of variables such that no two members of the group have the same value.