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rank(suppliers, [:status], :ranking)
+------+-------+---------+--------+----------+ | :sid | :name | :status | :city | :ranking | +------+-------+---------+--------+----------+ | S2 | Jones | 10 | Paris | 0 | | S1 | Smith | 20 | London | 1 | | S4 | Clark | 20 | London | 1 | | S3 | Blake | 30 | Paris | 3 | | S5 | Adams | 30 | Athens | 3 | +------+-------+---------+--------+----------+