--9.用户键盘输入5个数字,将数字按从小到大的顺序存入集合中:declare declare type num_type is table of number; n_tab num_type; temp_n number ; begin n_tab: num_type(&n1,&n2,&n3,&n4,&n5); for i in 1..n_tab.co…
1. 对应力扣题目连接
环形链表 II
2. 实现思路
a. 链表图示: b. 检测链表中是否存在环,即:会相交
思路:
使用 Floyd 的龟兔赛跑算法(Floyd’s Tortoise and Hare algorithm),即快慢指针法&…
Mysql 查询近6个月每个月有多少天:
SELECT
DATE_FORMAT(DATE_ADD(NOW(),INTERVAL-(CAST( help_topic_id AS SIGNED INTEGER )) MONTH ), %Y-%m) as months,DAY(LAST_DAY(CONCAT(DATE_FORMAT(DATE_ADD(NOW(),INTERVAL-(CAST( help_topic_id AS SIGNED INTEGER )) MO…