从 MySQL 列中获取最大值？
csharpserver side programmingprogramming更新于 2025/3/12 20:07:17
首先我们创建一个表 −
mysql> create table DemoTable -> ( -> Value int -> ); Query OK, 0 rows affected (0.63 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values(78); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(89); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(98); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(58); Query OK, 1 row affected (0.25 sec)
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 −
+-------+ | Value | +-------+ | 78 | | 89 | | 98 | | 58 | +-------+ 4 rows in set (0.00 sec)
以下是从列中获取最大值的查询 −
mysql> select Value from DemoTable order by Value DESC limit 1;
这将产生以下输出 −
+-------+ | Value | +-------+ | 98 | +-------+ 1 row in set (0.00 sec)
