[英]php query how to use “Order by” after using “Order By … Limit”?
[英]How to use multiple order by in a sql query with limit keyword?
我想通过首先将结果集限制为n个最高薪水,然后反转结果集并将其限制为1,来获得表中的n个最高薪水。
我使用了此查询,这会导致错误:-
select *
from salaries
where emp_no=(select * from salaries order by salary desc limit 2) order by salary asc limit 1;
该错误表明子查询返回多行。
这是一种方法:
SELECT s.* FROM
(SELECT * FROM `salaries` ORDER BY salary DESC LIMIT 2) s
ORDER BY s.salary ASC LIMIT 1;
请勿使用SELECT *
,请参阅http://www.parseerror.com/blog/select-*-is-evil
select * from salaries
order by salary
desc limit 1 offset 4;
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