直接上sql，简单粗暴！！
SELECTt1.area_name AS '省',t2.area_name AS '市',t3.area_name AS '区' FROM( SELECT * FROM base_area_new WHERE area_type = 1 AND version = 2 AND data_status = 1 ) AS t1INNER JOIN ( SELECT * FROM base_area_new WHERE area_type = 2 AND version = 2 AND data_status = 1 ) AS t2 ON t2.parent_code = t1.area_codeINNER JOIN ( SELECT * FROM base_area_new WHERE area_type = 3 AND version = 2 AND data_status = 1 ) AS t3 ON t3.parent_code = t2.area_code
