mysql数据库优化课程---13.mysql基础操作 一.总结 一句话总结:mysql复制表,索引,视图 1.mysql如何复制表? like select * 1.复制表结构 create table student like user; 2.复制表内容insert into student select * from user; 2.mysql中如何查看索引? show index show index from user\G 3.mysql普通索引如何创建和删除? create inde
3.耶稣有13个门徒.当中有一个就是出卖耶稣的叛徒,请用排除法找出这位叛徒:13人围坐一圈,从第一个開始报号:1.2,3.1,2,3.... 凡是报到"3"就退出圈子.最后留在圈子内的人就是出卖耶稣的叛徒.请找出它原来的序号. int a[13] = {1,2,3,4,5,6,7,8,9,10,11,12,13}; int number = 13;//记录当前人数 int count = 0;//1,2,3报数 int i = 0; while (number > 1) { if
一. 卸载opencv3.3.0: Going to the "build" folder directory of opencv from terminal, and execute the following: 1. $ sudo make uninstall2. $ cd ..3. $ sudo rm -r build4. $ sudo rm -r /usr/local/include/opencv2 /usr/local/include/opencv /usr/include/
13.如何拆分含有多种分隔符的字符串 import re s = "23:41:2314\1234#sdf\23;" print(re.split(r'[#:\;]+',s)) 14.如何判断字符串a是否以字符串b开头或结尾 import os,stat #找到当前目录下的文件名称,返回list ret = os.listdir('.') print(ret) for x in ret: #endswith传参类型是tuple if x.endswith(('.py','.html'