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mysql-5.7.22'this is incompatible with sql_mode=only_full_group_by'解决方法
# 临时解决:重启完数据库会失效 set @@GLOBAL.sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBS ...
分类:数据库   时间:2019-11-21 14:12:12    阅读次数:67
Exercise: Week 2-7
File artical.txt contains an article in English (please create the file by yourself and put any English article you picked in it). Assume the article ...
分类:其他好文   时间:2019-11-20 13:06:23    阅读次数:67
[leetcode] 199. Binary Tree Right Side View
Medium Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom. ...
分类:其他好文   时间:2019-11-18 11:23:03    阅读次数:72
9.1 关系及关系性质
9.1 Relations and Their Properties(关系及关系性质) 1.基本概念 Ordered pair(序偶) 当且仅当a1 = a2并且b1 = b2时, 才有序偶对(a1, b1)=(a2, b2) Cartesian product(笛卡尔积) 如果A和B是两个非空集, ...
分类:其他好文   时间:2019-11-15 18:34:43    阅读次数:115
#14 Longest Common Prefix
Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Exampl ...
分类:其他好文   时间:2019-11-13 00:54:18    阅读次数:88
[LC] 14. Longest Common Prefix
Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Exampl ...
分类:其他好文   时间:2019-11-11 09:49:00    阅读次数:68
LeetCode 回文串问题
5. Longest Palindromic Substring 647. Palindromic Substrings 解法一:从中心一点向两边扩展,需要考虑中心为一点,中心为两点。 解法二:马拉车算法 ...
分类:其他好文   时间:2019-11-10 17:13:46    阅读次数:73
QA:无重复字符的最长子串
无重复字符的最长字串 leetcode地址:https://leetcode-cn.com/problems/longest-substring-without-repeating-characters/ 题目描述: 给定一个字符串,请你找出其中不含有重复字符的 最长子串 的长度。 示例: 输入: ...
分类:其他好文   时间:2019-11-10 15:37:29    阅读次数:76
如何对网站服务器进行压力测试
1.yum install -y httpd-tools ab命令被集成到了httpd服务器中,所以想要使用ab命令需要先安装httpd服务 ab -c 并发请求HTTP报文数量 -n 总共发送少个请求报文 http://www.oldboy.com/index,html ab命令的使用方法和常用选 ...
分类:Web程序   时间:2019-11-09 13:23:42    阅读次数:131
ORACLE优化查询资源消耗的语句
1> SQL ordered by Gets select * from (select substr(sql_text,1,40) sql, buffer_gets, executions, buffer_gets/executions "Gets/Exec", hash_value,addres ...
分类:数据库   时间:2019-11-08 15:09:18    阅读次数:106
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