mssqlserver查询方法
其实我做了最简的就是如下写法
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 上一条记录的SQL语句: select top 1 * from news where newsid 下一条记录的SQL语句: select top 1 * from news where newsid>id order by newsid ASC  | 
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另一种写未能
id是指当前数据news_id参数
方法一:
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 string nextSql = "select top 1 * from news where news_id > " + id + " order by news_id ASC"  | 
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方法二:
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mysql查询上一条与下一条的办法
如果ID是主键或者有索引,可以直接查找:
方法1:
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|   1.select * from table_a where id = (select id from table_a where id < {$id} order by id desc limit 1);  2.select * from table_a where id = (select id from table_a where id > {$id} order by id asc limit 1);  | 
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方法2:
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|   1.select * from table_a where id = (select max(id) from table_a where id < {$id});  2.select * from table_a where id = (select min(id) from table_a where id > {$id});  | 
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其他更优的暂时还没想出来