当我们谈论到MySQL中的错误代码 1405,通常指的是“错误 1405: 使用 SET NAMES 语句无法选择正确的字符集。”这类问题常在数据库数据迁移或配置更新时发生,今天我们将一起探讨如何解决这个问题,并整合各个方面的知识以确保未来避免类似状况。
### 版本对比
首先,不同版本的MySQL在字符集处理上有着显著差异。例如:
- **MySQL 5.7** 与 **MySQL 8.0
1405: Highway
Time Limit: 1 Sec Memory Limit: 128 M\
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2022-09-07 10:53:42
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2011-12-20 05:26:53地址:http://acm.hdu.edu.cn/showproblem.php?pid=1405题意:分解素因子。mark:PE2次。每行最后有一个空格。太无聊了- -。代码:# include <stdio.h>void output(int n){ int i, cnt ; for (i = 2 ; n != 1 ; i++) { if (n%i==0) { cnt = 0 ; while (n%i==0){cnt++; n/=i;} pr...
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2012-01-06 22:45:00
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第一种方案,使用堆:
1 from heapq import heappush, heappop
2 class Solution:
3 def longestDiverseString(self, a: int, b: int, c: int) -> str:
4 max_heap = []
5 if a != 0:
6
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2020-04-06 08:50:00
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题意:遗产总量为1,n个继承人,第i人获得1/ai,1/ai随i增加而减少,要求分给n个人后必须有剩余,而且要求剩余最少。分析:高精度,用java做我们认为最开始财产是1/1我们对于财产剩余1/a时,应分给当前继承人1/(a+1)的财产。然后财产还剩下1/(a * (a + 1))。按此递推。为什么是正确的很难证明,只能经过多次尝试,或者打个低效递归检验一下。View Code import java.util.*;import java.io.*;import java.math.*;publicclass Main { publicstaticvoid main(String[] a...
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2011-06-16 19:00:00
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题目描述 Description 农民John的农场里有很多牧区。有的路径连接一些特定的牧区。一片所有连通的牧区称为一个牧场。但是就目前而言,你能看到至少有两个牧区通过任何路径都不连通。这样,农民John就有多个牧场了。 John想在农场里添加一条路径(注意,恰好一条)。对这条路径有以下限制: 一个
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2021-06-04 20:33:24
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The Last PracticeTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 9037Accepted Submission(s): 1905P...
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2015-11-25 13:05:00
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<script>function StorePage(){d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://www.365key.
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2024-09-28 21:34:22
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Problem Description Tomorrow is contest day, Are you all ready? We have been training for 45 days, and all guys must be tired.But , you are so lucky comparing with many excellent boys who have no cha
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2022-05-14 12:54:22
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DescriptionYour rich uncle died recently, and the heritage needs to be divided among your relatives and the church (your uncle insisted in his will that the church must get something). There are N relatives (N <= 18) that were mentioned in the will. They are sorted in descending order according t
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2012-07-18 23:34:00
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&n
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2013-06-30 17:17:00
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思路: 对于结点 u 的子节点 v, 如果已经一直到结点 u 的答案ans[u],那么转移到对于结点 v,num[v] 为 v为根的树的结点个数,那么对于结点v的答案相对于结点u的答案来说, ans[v]=-num[v]*edge[u,v]+(n-num[v])*edge[u,v]; /...
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2017-03-26 22:39:00
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A string is called happy if it does not have any of the strings 'aaa', 'bbb' or 'ccc' as a substring. Given three integers a, b and c, return any stri
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2020-06-11 10:45:00
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The Last PracticeTime Lim
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2022-08-11 16:34:13
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牛的旅行 【问题描述】 农民John的农场里有很多牧区。有的路径连接一些特定的牧区。一片所有连通的牧区称为一个牧场。但是就目前而言,你能看到至少有两个牧场不连通。现在,John想在农场里添加一条路径 ( 注意,恰好一条 )。对这条路径有这样的限制:一个牧场的直径就是牧场中最远的两个牧区的距离 ( 本
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2021-08-03 09:19:06
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DescriptionA string is called happy if it does not have any of the strings ‘a
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2022-08-11 17:34:50
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Link考虑到[1,k][1,k][1,k]和[2,k+1][2,k+1][2,k+1]只有一个位置不同,所以必定有a1=ak+1a_1=a_{k+1}a1=ak+1推广一下得到ai=ai+ka_i=a_{i+k}ai=ai+k,用这个可以特判掉一些无解的情况也就是可以分为kkk组a1=a1+k=a2+k...a_1=a_{1+k}=a_{2+k}...a1=a1+k=a2+k...这样如果只存在一个0/10/10/1,我们就可以把其他问号都赋值为0/10/10/1,若都有就无解否
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2022-01-27 13:44:28
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2.跳过验证:修改MySQL安装目录下的my.ini配置文件,使登录时跳过权限检查;#到mysql根目录找到mysql配置文件vim my.ini#在my.ini,[mysqld]下添加一行,使其登录时跳过权限检查skip_grant_tables3.修改密码:启动MySQL服务,登录MySQL,此时提示输入密码,输入任意密码回车即可进入MySQL。#登录mysqlmysql -u root -p
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2024-05-09 19:49:22
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The Last PracticeTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 11287 Accepted Submission(s): 2583Problem DescriptionTomorrow is
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2023-02-20 10:24:52
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Problem DescriptionTomorrow is contest day, Are you all ready?We have been training for 45 days, and all guys must be tired.But , you are so lucky comparing with many excellent boys who have no ch
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2021-08-05 11:51:58
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