1.按照指定(单个)字段排序

select * from table_name order id desc;

2.按照指定(多个)字段排序

select * from table_name order id desc,status desc;

3.按照指定字段和规则排序

select * from table_name order by field(status,5,1,2,3,4);

4.字符串排序 将字符串列参与计算自动转为int型

select * from table_name order by (varchar_column+0);