Execute todas as consultas obtidas ao executar esta consulta:
SELECT Concat('ALTER TABLE `', TABLE_NAME, '` RENAME TO `dr_', TABLE_NAME, '`;') FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '<name of your db>';
SELECT Concat('ALTER TABLE `', TABLE_NAME, '` RENAME TO `dr_', TABLE_NAME, '`;') FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '<name of your db>';