MySQL查询结果条数编号示例 mysql 查找结果中自动加序号列

SELECT @row := @row + 1 as row, t.id  FROM sgcorp_product t, (SELECT @row := 0) r  where t.id not in(select product_id from sgcorp_pic)

http://database.51cto.com/art/201011/235142.htm

http://blog.csdn.net/macwhirr123/article/details/7489484