select date_add(curdate(), interval(cast(help_topic_id as signed integer) - 30) day) day from mysql.help_topic where help_topic_id < day(last_day(curdate())) order by help_topic_id 2019-07-03更新进一步格式化版 SELECT DATE_FORMAT( date_add( curdate( ), INTERVA
Mysql 创建一个用户 hail,密码 hail,指定一个数据库 haildb 给 hail mysql -u root -ppassworduse mysql;insert into user(host,user,password) values('localhost','hail',password('hail'));flush privileges;create database haildb;grant all privileges on haildb.* to hail@localh
mysql 创建一个用户 hail,密码 hail,指定一个数据库 haildb 给 hail mysql -u root -p password use mysql; insert into user(host,user,password) values('localhost','hail',password('hail')); flush privileges; create database haildb; grant all privileges on haildb.* to hail@
python遍历一个目录,输出所有文件名 python os模块 os import os def GetFileList(dir, fileList): newDir = dir if os.path.isfile(dir): fileList.append(dir.encode('gbk')) elif os.path.isdir(dir): for s in os.listdir(dir): #如果需要忽略某些文件夹,使用以下代码 #if s == "xxx":
charAt(int index)遍历一个字符串的所有字符实例 String name = "Whatisjava?"; for (int i = 0; i < name.length(); i++) { char c = name.charAt(i); System.out.print(c + " "); }// W h a t i s j a v a ?
编写了一个遍历一个目录下所有的文件及文件夹,然后计算每个文件的字符和line的小程序,先把程序贴出来. #coding=utf-8 ''' Created on 2014年7月14日 @author: Administrator ''' import os import os.path rootdir =r'c:\python27\jiaoben' filefullnames=[] def traverse(rootdir,filefullnames): for parent,dirnames,
[python]python 遍历一个list 的小例子: mlist=["aaa","bbb","ccc"]for ss in enumerate(mlist): print ss 验证一下运行结果: In [34]: mlist=["aaa","bbb","ccc"] In [35]: for ss in enumerate(mlist): ....: print ss ....:
解析个遍历一个HTML文档 String html ="<html><head><title>First parse</title></head>" +"<body><p>Parsed HTML into a doc.</p></body></html>"; Document doc =Jsoup.parse(html); jsoup解析器能够尽最
mysql添加一个字段(在指定的一个字段后面) 举个栗子:alter table inquiry add error_code varchar(3) after add_time; 说明:alter table + 表名 + add + 要添加的字段 字段类型 + after + 要跟随的字段名 alter table t_adviser_info add hold int COMMENT '0持有,1未持有' after stockname alter table t_adviser_in
Solution 1: 修改1列(navicate可行) update student s, city c set s.city_name = c.name where s.city_code = c.code; Solution 2: 修改多个列 update a, b set a.title=b.title, a.name=b.name where a.id=b.id Solution 3: 采用子查询(navicate不可行) update student s set city_n
