从MySQL多列列表中获取最小值？
让我们首先创建一个表-
mysql> create table DemoTable756 ( Value1 int, Value2 int, Value3 int );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable756 values(10,20,14); mysql> insert into DemoTable756 values(20,34,17); mysql> insert into DemoTable756 values(200,134,789); mysql> insert into DemoTable756 values(139,98,99);
使用select语句显示表中的所有记录-
mysql> select *from DemoTable756;
这将产生以下输出-
+--------+--------+--------+ | Value1 | Value2 | Value3 | +--------+--------+--------+ | 10 | 20 | 14 | | 20 | 34 | 17 | | 200 | 134 | 789 | | 139 | 98 | 99 | +--------+--------+--------+ 4 rows in set (0.00 sec)
以下是从多列列表中获取最小值的查询-
mysql> select least(Value1,Value2,Value3) from DemoTable756;
这将产生以下输出-
+-----------------------------+ | least(Value1,Value2,Value3) | +-----------------------------+ | 10 | | 17 | | 134 | | 98 | +-----------------------------+ 4 rows in set (0.00 sec)