mysql> insert into DemoTable834 values(10,20); mysql> insert into DemoTable834 values(40,50); mysql> insert into DemoTable834 values(20,24); mysql> insert into DemoTable834 values(30,10); 以下是使用以下命令按两列中的最大值排序的查询GREATEST(): mysql> select *from DemoTable834 order by greatest(Value1,Value2) DESC;