从VARCHAR列中获取最小值和最大值,并在单独的MySQL列中显示结果?
让我们首先创建一个表-
create table DemoTable(
Value varchar(100)
);
使用插入命令在表中插入一些记录-
insert into DemoTable values('190');insert into DemoTable values('230');
insert into DemoTable values('120');
insert into DemoTable values('189');
使用select语句显示表中的所有记录-
select *from DemoTable;
这将产生以下输出-
+-------+| Value |
+-------+
| 190 |
| 230 |
| 120 |
| 189 |
+-------+
4 rows in set (0.00 sec)
以下是从VARCHAR列获取最小值和最大值并在单独的MySQL列中显示结果的查询-
select min(cast(Value AS SIGNED)) AS Min,max(cast(Value AS SIGNED)) AS Max
from DemoTable;
这将产生以下输出-
+------+------+| Min | Max |
+------+------+
| 120 | 230 |
+------+------+
1 row in set (0.03 sec)
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