41.排序查询总结
select 查询列表
form 表
where 筛选条件
order by paixu列表 asc/desc
1.asc 代表升序,desc带表降序
如果不写默认升序
order by可以支持单个字段,多个字段,表达式,函数,别名
一般在最后
案例1:查询员工信息,从低到高排
select*from employees order by salary desc;
select*from emplouess oder by salary asc;
查询员工的姓名和年薪,按案例年薪降序,姓名升序
select lat_name,salary *12(1+ifnull(commission_pct,0))from employee order by salary desc,lat_name
asc;
select last_name,salary from employee where salary not between 8000 and
17000 oder by salary desc;
select*from where email like"%e%" order by length(email) desc,department_id
asc;

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