题目
917:Knight Moves 总时间限制: 1000ms 内存限制: 65536kB 描述 Background Mr Somurolov, fabulous chess-gamer indeed, asserts that no one else but him can move knights from one position to another so fast. Can you beat him? The Problem Your task is to wr…
Problem: 1084. 销售分析III 👨🏫 参考题解
Code
select s.product_id,p.product_name
from sales s left join product p
on s.product_id p.product_id
group by product_id
having count(if(sale_date between 2019-01-01 and 2019-03-31,1,nu…
MySQL 自增 ID 一般用的数据类型是 INT 或 BIGINT,正常情况下这两种类型可以满足大多数应用的需求。
当然也有不正常的情况,当达到其最大值时,尝试插入新的记录会导致错误,错误信息类似于:
ERROR 167 (22003): Out o…