让我们首先创建一个表-
mysql> create table DemoTable ( Name varchar(100), Age int );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values('Chris',23); mysql> insert into DemoTable values('David',55); mysql> insert into DemoTable values('Bob',53); mysql> insert into DemoTable values('Mike',54); mysql> insert into DemoTable values('Sam',55);
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-
+-------+------+ | Name | Age | +-------+------+ | Chris | 23 | | David | 55 | | Bob | 53 | | Mike | 54 | | Sam | 55 | +-------+------+ 5 rows in set (0.00 sec)
以下是查询以选择具有最大年龄值的所有用户-
mysql> select *from DemoTable where Age=(select max(Age) from DemoTable);
这将产生以下输出-
+-------+------+ | Name | Age | +-------+------+ | David | 55 | | Sam | 55 | +-------+------+ 2 rows in set (0.00 sec)