SQL必知必会学习笔记2-Kane

二.排序检索数据

• 按单个列排序

select prod_name
from products
order by prod_name;

• 按多个列排序

select prod_name,prod_id,prod_price
from products
order by prod_price,prod_name;

• 按列位置排序

select prod_id,prod_price,prod_name
from droduct
order by 2,3;

• 降序排序

• desc只对它前面的那一列起作用，如果要每一列都降序排列则要在每一列后面都加desc

select prod_id,prod_price,prod_name
from droduct
order by prod_price desc,prod_name;