摘要： 第一步 使用group by 和 having cout 查找重复字段 SELECT t1.`order_book_id` FROM `quant_stock_info` t1 GROUP BY t1.`order_book_id` HAVING COUNT(t1.`order_book_id`)>1 第二步 使用IN查找 SELECT * FROM `quant_stock_info`... 阅读全文