SQL查询当前数据上一条和下一条的记录

id是指当前数据news_id参数

方法一：

string preSql = "select top 1 * from news where news_id < " + id + " order by news_id DESC"

string nextSql  = "select top 1 * from news where news_id > " + id + " order by news_id ASC"

方法二：

string preSql = "select * from [news] where news_id = (select MAX(news_id) from [news] where news_id<" + id + ")";
string nextSql = "select * from [news] where news_id = (select MIN(news_id) from [news] where news_id>" + id + ")";