Linux下Golang编译程序在后台运行及开机启动 Linux下Golang编译程序在后台运行及开机启动编译需要在项目根目录设置GOPATH为amd64set GOPACH=amd64设置GOOS为linuxset GOOS=linux指定输出文件名go build test.go指定输出文件名go build -o custom_name修改可执行权限chmod 777 程序名称程序后台运行nohup ./custom_name &不输出错误信息nohup ./custom_name >/dev/null 2>&1 &关闭程序查询进程号ps aux|grep custom_name关闭进程kill 进程编号开机启动golangvi /etc/rc.local

Vue 银行卡号 每4位补一个空格 vue 隔四个字符加一个空格效果图输入方式进行格式化代码: <el-form-item label="测试" prop="test"> <el-input v-model="queryParams.test" placeholder="测试" clearable :maxlength="23" size="small" /> </el-form-item>watch监听 watch: { ['queryParams.test'](val) { this.$nextTick(() => { this.queryParams.test = val.replace(/\D/g,'').replace(/....(?!$)/g,'$& '); console.log('数字是多少:', this.queryParams.test,val) }); } },展示直接格式化{{ item.name.replace(/(\d{4})(?=\d)/g, '$1 ') }}

mysql怎么获取不重复的数据？ mysql怎么获取不重复的数据？mysql获取不重复的数据的方法：在查询语句中添加distinct关键字来过滤重复的记录select distinct 字段名 from 数据表;使用方法对单个字段进行去重sql：select distinct age from user;对多个字段进行去重sql:select distinct name,age from user;对多个字段进行去重并求count的sql:select count(distinct name,age) as total from user;也可以对select * 进行去重select distinct * from user;

使用SQL语句来判断数据库中时间，是否为当日时间 使用SQL语句来判断数据库中时间，是否为当日时间可直接使用select count(*) from history_visitor where date_format(visit_time,'%Y-%m-%d')= date_format(now(),'%Y-%m-%d') 直接在sql中实现了将create_time和当前时间按年月日格式比较，若处在一条相同的·，则说明该用户今日已签到。mysql判断时间是否是当天，昨天今天 select * from 表名 where to_days(时间字段名) = to_days(now()); 昨天 SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) - TO_DAYS( 时间字段名) <= 1 7天 SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(时间字段名) 近30天 SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(时间字段名) 本月 SELECT * FROM 表名 WHERE DATE_FORMAT( 时间字段名, '%Y%m' ) = DATE_FORMAT( CURDATE( ) , '%Y%m' ) 上一月 SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , '%Y%m' ) , date_format( 时间字段名, '%Y%m' ) ) =1 #查询本季度数据 select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(now()); #查询上季度数据 select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER)); #查询本年数据 select * from `ht_invoice_information` where YEAR(create_date)=YEAR(NOW()); #查询上年数据 select * from `ht_invoice_information` where year(create_date)=year(date_sub(now(),interval 1 year)); 查询当前这周的数据 SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now()); 查询上周的数据 SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now())-1; 查询当前月份的数据 select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(now(),'%Y-%m') 查询距离当前现在6个月的数据 select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now(); 查询上个月的数据 select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),'%Y-%m') select * from ` user ` where DATE_FORMAT(pudate, ' %Y%m ' ) = DATE_FORMAT(CURDATE(), ' %Y%m ' ) ; select * from user where WEEKOFYEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) = WEEKOFYEAR(now()) select * from user where MONTH (FROM_UNIXTIME(pudate, ' %y-%m-%d ' )) = MONTH (now()) select * from [ user ] where YEAR (FROM_UNIXTIME(pudate, ' %y-%m-%d ' )) = YEAR (now()) and MONTH (FROM_UNIXTIME(pudate, ' %y-%m-%d ' )) = MONTH (now()) select * from [ user ] where pudate between 上月最后一天 and 下月第一天 where date(regdate) = curdate(); select * from test where year(regdate)=year(now()) and month(regdate)=month(now()) and day(regdate)=day(now()) SELECT date( c_instime ) ,curdate( ) FROM `t_score` WHERE 1 LIMIT 0 , 30

php远程请求CURL案例（爬虫、保存登录状态） php远程请求CURL案例