如何从学生评分表中获得第二高的价值？
要获取第二个最大值，请使用ORDERBYDESC和LIMIT1,1。让我们首先创建一个表-
mysql> create table DemoTable ( StudentScore int );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values(89); mysql> insert into DemoTable values(69); mysql> insert into DemoTable values(97); mysql> insert into DemoTable values(99);
使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
这将产生以下输出-
+--------------+ | StudentScore | +--------------+ | 89 | | 69 | | 97 | | 99 | +--------------+ 4 rows in set (0.00 sec)
以下是获取第二高值的查询-
mysql> select *from DemoTable order by StudentScore DESC limit 1,1;
这将产生以下输出-
+--------------+ | StudentScore | +--------------+ | 97 | +--------------+ 1 row in set (0.00 sec)