event_schedule

春节活动策划方案英文翻译1. IntroductionThe Spring Festival, also known as Chinese New Year, is the most important traditional holiday in China. It is a time for people to gather with family, celebrate the new year, and wish for good luck and prosperity. To make the most of this festive season, we propose a series of activities that will engage the community and create a joyful and memorable experience for everyone.2. Venue SelectionThe venue for the Spring Festival activities should be spacious and easily accessible for the community. An ideal location could be a public square or park that is centrally located and has enough space to accommodate various activities, such as stage performances, food stalls, and game booths.3. Event ScheduleThe Spring Festival activities will span over several days, allowing different age groups to participate and enjoy the festivities. The following is a proposed schedule:Day 1: Opening Ceremony and Lion Dance- The event will begin with an opening ceremony, featuring traditional Chinese music and dance performances.- A spectacular lion dance will then take place to ward off evil spirits and bring good luck for the coming year.Day 2: Cultural Performances and Food Festival- Various cultural performances, such as traditional music and dance, martial arts demonstrations, and acrobatics, will be scheduled throughout the day.- A food festival will also be held, showcasing a wide range of local and traditional Chinese delicacies for attendees to enjoy.Day 3: Family Games and Lantern Festival- Family-oriented games, such as tug-of-war, egg rolling, and sack race, will be organized to encourage participation and promote family bonding.- In the evening, a lantern festival will take place, with beautifully decorated lanterns illuminating the venue, creating a magical and festive atmosphere.4. Art and Craft WorkshopsTo engage the community and promote traditional Chinese culture, art and craft workshops will be set up throughout the event. These workshops will provide hands-on experiences for participants to learn traditional crafts, such as paper-cutting, calligraphy, and painting. Participants will be able to take their creations home as souvenirs, enhancing their connection to the cultural heritage.5. Traditional PerformancesTo showcase the diversity and richness of Chinese culture, a series of traditional performances will be held on the main stage. These performances will include Chinese opera, traditional music and dance, puppet shows, and storytelling. Local artists and performers will be invited to showcase their talents and provide a unique cultural experience for attendees.6. Children's ActivitiesTo ensure that the Spring Festival activities cater to all age groups, special activities for children will be organized. These activities may include face painting, balloon twisting, storytelling sessions, and interactive games. The objective is to create a joyful and playful atmosphere for children, allowing them to participate in the festivities alongside their families.7. Social ResponsibilityIn addition to celebrating the Spring Festival, we believe it is important to give back to the community. Thus, a portion of the event's proceeds will be donated to local charities or used to support community development projects. This will not only create a positive impact but also encourage the community to come together and contribute to the betterment of society.8. Publicity and MarketingTo ensure the success of the Spring Festival activities, effective publicity and marketing strategies will be employed. The following methods will be used:- Flyers and posters: Print and distribute flyers and posters promoting the event to local shops, community centers, schools, and other key locations.- Social media promotion: Utilize popular social media platforms, such as Facebook, Instagram, and Twitter, to create event pages and regularly update them with engaging content, including event updates, performer profiles, and interactive polls.- Media coverage: Collaborate with local newspapers, radio stations, and television channels to secure media coverage and interviews to increase awareness about the event.- SMS and email marketing: Utilize SMS and email marketing campaigns to reach out to previous event attendees and subscribers and inform them about the upcoming Spring Festival activities.In conclusion, the proposed Spring Festival activities aim to create a memorable and inclusive experience for the community. By incorporating traditional cultural performances, family-oriented games, art and craft workshops, and social responsibility initiatives, the event will offer something for everyone to enjoy and participate in.。

如何使用MySQL存储过程实现定时任务一、引言在开发和管理数据库系统时，经常会涉及到定时任务的执行。

定时任务可以帮助我们自动化地执行一系列的操作，提高系统的效率和准确性。

对于MySQL数据库系统来说，存储过程是实现定时任务的一种常用技术手段。

本文将围绕如何使用MySQL存储过程来实现定时任务展开讨论。

二、存储过程简介存储过程是一组为了完成特定功能的SQL语句集合，这些SQL语句按照一定的逻辑顺序组织在一起并存储在数据库中。

存储过程可以在需要时被调用执行，它可以接受输入参数并返回结果。

三、实现定时任务的需求分析在实际的应用场景中，我们通常需要定时执行一些操作，比如每天凌晨执行数据备份、每隔一段时间清理过期数据等。

这些操作可以通过定时任务来实现。

四、使用事件调度器实现定时任务MySQL提供了事件调度器（Event Scheduler）的功能，可以用来实现定时任务的执行。

事件调度器是MySQL的一个后台线程，它会按照指定的时间间隔触发指定的事件。

五、创建事件要创建一个事件，需要使用CREATE EVENT语句。

下面是一个创建每天凌晨执行数据备份的事件的示例：```sqlCREATE EVENT backup_eventON SCHEDULE EVERY 1 DAY STARTS CURRENT_TIMESTAMP + INTERVAL 1 DAYDOBEGIN-- 执行数据备份的SQL语句END;```在上面的示例中，备份事件被命名为backup_event，指定了每天执行一次，并设置了事件的触发时间为当前时间加上一天。

六、启用事件调度器在创建事件后，需要启用事件调度器才能使其生效。

可以使用以下语句来启用事件调度器：```sqlSET GLOBAL event_scheduler = ON;```通过将event_scheduler参数设置为ON，即可启用事件调度器。

如果要禁用事件调度器，可以将该参数设置为OFF。

世界读书日活动的活动流程英语（中英文实用版）Title: World Book Day Event ScheduleThe World Book Day event is an annual celebration of literature and reading.This year"s event will be held on April 23rd and will feature a variety of activities for participants of all ages.活动流程将贯穿整个日期，从早晨开始，我们将举行一场盛大的开幕式。

在开幕式上，我们将邀请知名作家进行演讲，分享他们的阅读体验和对文学的热爱。

同时，我们还将安排一场特别的诗歌朗诵会，让参与者感受诗歌的魅力。

Throughout the day, there will be a variety of events for participants of all ages.In the morning, we will host a grand opening ceremony.At the ceremony, we will invite renowned authors to give speeches, sharing their reading experiences and their love for literature.Additionally, we will arrange a special poetry recitation event to let participants experience the charm of poetry.下午将举行一系列的文学研讨会和作者签售会。

参与者可以近距离接触到自己喜欢的作家，并听取他们的文学讲座。

同时，我们还将设置一个创意写作工作坊，让参与者有机会锻炼自己的写作技巧。

mysql通过事件定时删除过期数据记录⽅法1、查看MySQL是否开启了事件功能查看命令：show variables like '%sc%';打开event_scheduler（临时开启，MySQL服务重启后时效）SET GLOBAL event_scheduler = ON;永久开启⽅法：f中[mysqld]添加event_scheduler=on #重启服务2、创建事件create event myevent on SCHEDULE every 5 second do delete from Syslog.SystemEvents whereReceivedAt<(CURRENT_TIMESTAMP() + INTERVAL -5 DAY);#删除5天前的数据说明：ReceivedAt：数据库Syslog.Systemevents表中的时间字段(date,INTERVAL expr type):date：数据库当前时间CURRENT_TIMESTAMP()INTERVAL：关键字（间隔）expr：具体的时间间隔（-5）type:时间单位：MICROSECOND间隔单位：毫秒SECOND间隔单位：秒MINUTE间隔单位：分钟HOUR间隔单位：⼩时DAY间隔单位：天WEEK间隔单位：星期MONTH间隔单位：⽉QUARTER间隔单位：季度YEAR间隔单位：年SECOND_MICROSECOND复合型，间隔单位：秒、毫秒，expr可以⽤两个值来分别指定秒和毫秒MINUTE_MICROSECOND复合型，间隔单位：分、毫秒MINUTE_SECOND复合型，间隔单位：分、秒HOUR_MICROSECOND复合型，间隔单位：⼩时、毫秒HOUR_SECOND复合型，间隔单位：⼩时、秒HOUR_MINUTE复合型，间隔单位：⼩时分DAY_MICROSECOND复合型，间隔单位：天、毫秒DAY_SECOND复合型，间隔单位：天、秒DAY_MINUTE复合型，间隔单位：天、分DAY_HOUR复合型，间隔单位：天、⼩时YEAR_MONTH复合型，间隔单位：年、⽉如果存在事件，请先删除，删除命令：drop event if exists myevent;3、开启事件alter event myevent on completion preserve enable;4、关闭事件的命令：alter event myevent on completion preserve disable;。

1.查看是否开启evevt与开启evevt。

1.1、MySQL evevt功能默认是关闭的,可以使用下面的语句来看evevt的状态，如果是OFF 或者0，表示是关闭的。

show VARIABLES LIKE'%sche%';1.2、开启evevt功能SET GLOBAL event_scheduler = 1;2.创建定时器的过程2.1、创建测试表testdrop table if exists test;create table test(id int(11) not null auto_increment primary key,time datetime not null) engine=innodb default charset=utf8;2.2、创建evevt要调用的存储过程test_procedelimiter //drop procedure if exists test_proce//create procedure test_proce()begininsert into test(time) values(now());end//delimiter ;2.3、开启evevt（要使定时起作用,MySQL的常量GLOBAL event_scheduler必须为on或者是1）执行show variables like 'event_scheduler';查看evevt是否开启；若没开启执行set global event_scheduler='on';2.4、创建事件test_event（其作用：每隔一秒自动调用test_proce()存储过程）drop event if exists test_event;create event test_eventon schedule every 1 secondon completion preserve disabledo call test_proce();2.5、开启事件test_eventalter event test_event on completion preserve enable;2.6、关闭事件test_eventalter event test_event on completion preserve disable;2.7、查看表testselect * from test;3.查看自己创建的event如果要查看更加详细的信息，你需要root用户的授权，如果是你自己的数据库你可以用下面语句查看select * from mysql.event;下面的我的evevt的查看结果4.event的时间设置设置event很简单，但是麻烦的是如何设置执行的时间，网上找了一些，自己总结了一下。

1. Saber MAST模型分类MAST可以描述如下三类系统，每一类系统模型写法各不相似。

（1）持续模仿系统(continuous analog systems)在仿真持续模仿系统时仿真器按照仿真时刻重复求解一系列代表仿真模型微分方程。

此类系统每一种节点（node）都涉及两个系统变量(system variable)，一种across量和一种through量，普通每个量都与一种单位（unit）关联，在cosmos scope中显示波形时可以显示相应单位。

以电气模型为例，每一种节点都涉及一种across量(电压)和一种though量(电流)，单位分别是V和A。

持续模仿系统还涉及液压系统和磁路系统。

（2）事件驱动系统(event driven systems)此类系统典型代表是数字逻辑系统，仿真器只有在事件发生时（如输入量发生变化）才计算并更新各个输出。

此类系统节点只包括一种无单位量。

（3）数据流系统(data flow systems)此类模型典型代表是控制系统，和持续模仿系统类似，可以按照时域或频域仿真，但是严格区别输入量和输出量，节点只包括一种无单位量。

2. MAST 基本概念2．1 MAST template基本形式MAST template 是用MAST语言描述一种仿真模型基本单位。

MAST template是按照特定语法编写纯文本文献，后缀是.sin。

MAST template基本格式涉及如下几种某些：(1) template header –声明template名称（reference），管脚（pin）和参数（argument）基本形式如下：template TEMPLATE_NAME PIN1 [PIN2 PIN3…] = ARG1，[ARG2，ARG3 …]PIN_DECLARATIONARG_DECLARATION容易看出template header由核心字template开始，背面紧跟template名称，再接下来是管脚（pin）名称，然后是一种等号（=），接下来是参数名、值得注意是等号左边各个名称不需要用逗号（,）分隔，而等号右边必要用逗号分隔各个参数。

MySQL8.0的参数event_scheduler默认是ON，请注意⼀些坑event_scheduler是什么？event_scheduler是什么MySQL定时器的开关，类似于windows操作系统的定时任务的概念，指定某个时间点执⾏⼀次定时任务，或者每隔⼀段时间循环执⾏定时任务。

这个东西有企业在⽤么？看了⼏个企业的开发规范，都没有提及需要禁⽤event功能，所以event功能是允许开发⼈员使⽤的。

（不过，我相信java开发⼈员更喜欢⽤java定时器。

）也许是因为mysql默认就不启⽤event功能嘛，默认就⽆法⽤event，开发规范就不提及这东西啦。

况且可以通过⽤户权限控制来控制开发⼈员是否可以使⽤event。

所以从我⼿上的⼏家公司的开发规范⾥，并不可以实际看出⼤家有没有使⽤event_scheduler这个功能。

由于MySQL8.0默认是开启event_scheduler功能了，我认为我们还是有必要讨论⼀下event到底有没有坑？我能想到的坑——主从复制的坑⾸先这个事情并没有实际发⽣在我⽣产环境，是⼈为想出来的⼀种场景。

准备:两个MySQL8.0数据库实例mysql3308mysql33081配置⽂件不显⽰地指定默认值:[root@192-168-199-198 mysql3308]# cat f |grep event_schedulerMySQL8.0的默认值即为:mysql> show variables like '%event_scheduler%';+-----------------+-------+| Variable_name | Value |+-----------------+-------+| event_scheduler | ON |+-----------------+-------+1 row in set (0.12 sec)我给⼤家做了以下的测试。

如何使用MySQL进行数据的定时任务和调度在现代的数据驱动时代，许多应用程序需要定期执行一些特定的任务和调度，以确保数据的准确性和完整性。

MySQL作为最常用的关系型数据库管理系统之一，提供了一些内置的机制来实现这些定时任务和调度。

本文将介绍如何使用MySQL来进行数据的定时任务和调度。

一、MySQL事件调度器MySQL事件调度器是一个内置的机制，用于定期执行指定的任务。

它可以在指定的时间间隔内重复执行任务，也可以在每天、每周或每月的特定时间执行任务。

使用MySQL事件调度器的好处是它的简单性和可靠性，而且不需要外部工具或应用程序的支持。

1.1 创建事件调度器要创建一个事件调度器，我们可以使用MySQL的CREATE EVENT语句。

下面是一个例子：```CREATE EVENT event_nameON SCHEDULE EVERY 1 DAYSTARTS CURRENT_TIMESTAMP + INTERVAL 1 HOURDO-- 执行任务的SQL语句```在这个例子中，我们创建了一个名为event_name的事件调度器，它将每天执行一次。

它的执行时间为当前时间加上1小时。

1.2 修改事件调度器如果我们想修改一个已经存在的事件调度器，可以使用ALTER EVENT语句。

下面是一个例子：```ALTER EVENT event_nameON SCHEDULE EVERY 1 WEEKSTARTS CURRENT_TIMESTAMP + INTERVAL 2 HOURSDO-- 执行任务的SQL语句```在这个例子中，我们将事件调度器的执行频率修改为每周一次，并将执行时间修改为当前时间加上2小时。

1.3 删除事件调度器如果我们想删除一个事件调度器，可以使用DROP EVENT语句。

下面是一个例子：```DROP EVENT event_name;```在这个例子中，我们删除了名为event_name的事件调度器。

mysql计划任务MySQL计划任务。

MySQL计划任务是一种非常有用的功能，它可以帮助用户自动执行重复性的任务，比如备份数据库、优化表、定期清理数据等。

在MySQL中，我们可以通过使用事件调度器来创建和管理计划任务。

创建计划任务。

要创建一个计划任务，首先我们需要确保事件调度器是开启的。

可以通过以下命令来查看事件调度器的状态：```sql。

SHOW VARIABLES LIKE 'event_scheduler';```。

如果事件调度器的值为ON，表示调度器已经开启。

如果是OFF，可以通过以下命令来开启事件调度器：```sql。

SET GLOBAL event_scheduler = ON;```。

一旦事件调度器开启，我们就可以创建计划任务了。

下面是一个创建计划任务的示例：```sql。

CREATE EVENT my_event。

ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 HOUR。

DO。

-在这里写上需要执行的SQL语句。

```。

在这个示例中，我们创建了一个名为my_event的计划任务，它会在当前时间的1小时后执行指定的SQL语句。

管理计划任务。

一旦计划任务创建完成，我们还可以对其进行管理，比如修改执行时间、启用或禁用计划任务等。

以下是一些常用的管理计划任务的命令：```sql。

-查看所有计划任务。

SHOW EVENTS;-查看特定计划任务的详细信息。

SHOW CREATE EVENT my_event;-启用计划任务。

ALTER EVENT my_event ENABLE;-禁用计划任务。

ALTER EVENT my_event DISABLE;-修改计划任务执行时间。

ALTER EVENT my_event ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 2 HOUR;```。

通过这些命令，我们可以方便地管理和调整计划任务的执行情况。

年会策划方案用英语怎么说Title: Annual Event Proposal: Grandiose Celebrations - Uniting for a Stellar FutureIntroduction:The purpose of this proposal is to present a comprehensive plan for organizing an annual event to celebrate the achievements, foster team spirit, and provide employees with an enjoyable and memorable experience. Our annual event, "Grandiose Celebrations - Uniting for a Stellar Future," is designed to exceed expectations and create an environment of camaraderie and motivation within our organization. This proposal entails a detailed overview of the event format, budget, schedule, theme, venue, activities, and marketing strategies.I. Event Format:a. Date and Duration:- Proposed date: January 31, 2023- Duration: One-day event, starting from 10:00 AM to 10:00 PM b. Attendees:- All employees, including management, staff, and their families - Invited guests: Key clients, industry partners, and stakeholders c. Event Location:- Choose a spacious and easily accessible venue, centrally located- Sufficient parking space to accommodate all attendeesd. Event Theme:- "Uniting for a Stellar Future" - symbolizing unity, progress, and shared goals- Colors: Blue and silver, representing ambition, loyalty, and innovatione. Event Budget:- An estimated budget of $100,000 will be allocated for the event, considering the number of attendees, logistics, equipment, and entertainment.II. Event Schedule:a. Morning Session (10:00 AM - 1:00 PM):- Welcome address by the CEO, highlighting the achievementsof the previous year and the vision for the future- Keynote speakers from industry experts to provide insights and inspiration- Panel discussions on industry trends, challenges, and opportunities- Recognition and awards ceremony to appreciate outstanding employee contributionsb. Lunch Session (1:00 PM - 2:30 PM):- A buffet-style lunch with various cuisines and dietary options- Informal networking opportunities for employees and guests to interactc. Afternoon Session (2:30 PM - 5:00 PM):- Team building activities to enhance cooperation and team dynamics- Fun-filled games and competitions promoting collaboration andproblem-solving- Dedicated zone for children's engagement and entertainment d. Evening Session (6:00 PM - 10:00 PM):- Illuminating dinner with live music and entertainment- Cultural performances showcasing the diversity and talent within the organization- DJ and dance floor to encourage joyful participation- Grand raffle draw with exciting prizesIII. Venue Selection:a. Analysis of Potential Venues:- Evaluate multiple venue options based on capacity, facilities, ambiance, and cost- Consider venues with customizable spaces for different event sessionsb. Proposed Venue:- XYZ Banquet Hall, located in the city center- Capacity: 500 attendees, providing ample space for activities and networking- Adequate audio-visual equipment and technical support available- Convenient parking facilities nearbyIV. Activities and Engagements:a. Team Building Activities:- Collaborative activities promoting teamwork, trust, and problem-solving- Games such as treasure hunts, escape rooms, and interactivegroup challenges- Facilitated workshops encouraging communication and creativityb. Entertainment:- Live music performances, featuring popular local bands and artists- Cultural shows exhibiting diverse talents among employees- Choreographed dance performances showcasing the spirit of unity and celebrationc. Children's Zone:- Engaging games, face painting, and interactive activities for employees' children- Supervised play area ensuring their safety and enjoymentV. Marketing and Promotion:a. Invitations:- Personalized invitations to employees, guests, and stakeholders - Utilize digital platforms for timely and efficient invitations and RSVPsb. Event Branding:- Design event logo and related visuals to be used on invitations, banners, and social media- Create a hashtag for attendees to share their experience on social media platformsc. Pre-event Marketing:- Engage employees through internal newsletters, highlightingevent updates and key attractions- Conduct regular email reminders to ensure maximum participationd. Post-event Coverage:- Publish event highlights, photos, and success stories on the company website and social media platformsConclusion:With the detailed proposals above, "Grandiose Celebrations - Uniting for a Stellar Future" promises to be a remarkable annual event, reinforcing team spirit, fostering collaboration, and leaving a lasting impression on attendees. The combination of informative sessions, team-building activities, engaging entertainment, and a festive environment will create an unforgettable experience for all participants. By organizing this event, our organization aims to celebrate accomplishments, motivate employees, and pave the way for a brighter future.。

⼋种⽤Python实现定时执⾏任务的⽅案，⼀定有你⽤得到的！我们在⽇常⼯作中，常常会⽤到需要周期性执⾏的任务。

⼀种⽅式是采⽤ Linux 系统⾃带的 crond 结合命令⾏实现；⼀种⽅式是直接使⽤Python；于是我把常见的Python定时任务实现⽅法整理了⼀下，希望对⼤家有所帮助。

利⽤while True: + sleep()实现定时任务使⽤Timeloop库运⾏定时任务利⽤threading.Timer实现定时任务利⽤内置模块sched实现定时任务利⽤调度模块schedule实现定时任务利⽤任务框架APScheduler实现定时任务Job 作业Trigger 触发器Executor 执⾏器Jobstore 作业存储Event 事件调度器APScheduler中的重要概念Scheduler的⼯作流程使⽤分布式消息系统Celery实现定时任务使⽤数据流⼯具Apache Airflow实现定时任务Airflow 产⽣的背景Airflow 核⼼概念Airflow 的架构很多⼩伙伴在学习Python的过程中因为没⼈解答指导，或者没有好的学习资料导致⾃⼰学习坚持不下去，从⼊门到放弃，所以⼩编特地创了⼀个群，给⼤家准备了⼀份学习资料送给⼤家，有啥问题都可以在群⾥问，互相交流~ 包括但不限于： Python 环境、pycharm编辑器/永久激活/翻译插件 python 零基础视频教程 Python 界⾯开发实战教程 Python 爬⾍实战教程 Python 数据分析实战教程 python 游戏开发实战教程Python 电⼦书100本 Python 学习路线规划都可以在群⾥免费领取 Python 相关问题可解答 Python 相关外包需求可发布 Python 相关招聘需求可发布⼀、利⽤while True: + sleep()实现定时任务位于 time 模块中的 sleep(secs) 函数，可以实现令当前执⾏的线程暂停 secs 秒后再继续执⾏。

mysql event 语法MySQL事件是指在数据库中预定和执行的操作，类似于计划任务。

以下是MySQL事件的语法：1. 创建事件：```sqlCREATE EVENT event_nameON SCHEDULE schedule[ON COMPLETION [NOT] PRESERVE]DOevent_body;```- `event_name`：事件的名称。

- `schedule`：事件执行的计划。

- `ON COMPLETION`：指定事件完成时要执行的操作。

- `event_body`：事件执行的SQL语句。

2. 修改事件：```sqlALTER EVENT event_nameON SCHEDULE schedule[ON COMPLETION [NOT] PRESERVE]DOevent_body;```3. 删除事件：```sqlDROP EVENT [IF EXISTS] event_name;```4. 查看事件：```sqlSHOW EVENTS [{FROM | IN} schema_name][LIKE 'pattern' | WHERE expr];```在`schedule`部分可以指定以下参数：- `AT timestamp`：在指定时间触发事件。

- `EVERY interval`：以指定的间隔时间触发事件。

例如，`EVERY 1 HOUR`表示每小时触发一次。

- `STARTS timestamp`：指定事件的起始时间。

- `ENDS timestamp`：指定事件的结束时间。

`ON COMPLETION`部分可以指定以下参数：- `NOT PRESERVE`：默认情况下，在事件完成后会被保留。

使用`NOT PRESERVE`可以在事件完成后删除事件。

请注意，在创建事件之前，必须启用事件调度器。

可以使用以下语句启用事件调度器：```sqlSET GLOBAL event_scheduler = ON;```可以使用以下语句查看事件调度器的状态：```sqlSHOW VARIABLES LIKE 'event_scheduler'; ```。

mysql的event（事件）⽤法详解SELECT * FROM mysql.event;SET GLOBAL event_scheduler = 1; -- 开启定时器 0：off 1：onSHOW VARIABLES LIKE 'event_scheduler';-- 查看是否开启定时器如果显⽰OFF,则输⼊以下语句开启：set global event_scheduler = on;提醒：虽然这⾥⽤set global event_scheduler = on语句开启了事件，但是每次重启电脑。

或重启mysql服务后，会发现，事件⾃动关闭（event_scheduler=OFF），所以想让事件⼀直保持开启，最好修改配置⽂件，让mysql服务启动的时候开启时间，只需要在my.ini配置⽂件的[mysqld]部分加上event_scheduler=ON 即可，如下：1 MySQL从5.1开始⽀持event功能，类似oracle的job功能。

有了这个功能之后我们就可以让MySQL⾃动的执⾏数据汇总等功能，不⽤像以前需要操作的⽀持了。

如linux crontab功能。

-- 查看是否开启定时器 SHOW VARIABLES LIKE '%sche%'; +23 MySQL从5.1开始⽀持event功能，类似oracle的job功能。

有了这个功能之后我们就可以让MySQL⾃动的执⾏数据汇总等功能，不⽤像以前需要操作的⽀持了。

如linux crontab功能。

45 -- 查看是否开启定时器6 SHOW VARIABLES LIKE '%sche%';78 +-----------------+-------+9 | Variable_name | Value |10 +-----------------+-------+11 | event_scheduler | ON |12 +-----------------+-------+13 1 row in set1415161718 -- 开启定时器 0：off 1：on19 SET GLOBAL event_scheduler = 1;2021 -- 创建事件22 --每隔⼀秒⾃动调⽤e_test()存储过程23 CREATE EVENT IF NOT EXISTS event_test24 ON SCHEDULE EVERY 1 SECOND25 ON COMPLETION PRESERVE26 DO CALL e_test();2728 -- 开启事件29 ALTER EVENT event_test ON30 COMPLETION PRESERVE ENABLE;3132 -- 关闭事件33 ALTER EVENT event_test ON34 COMPLETION PRESERVE DISABLE;3536 从现在开始每隔九天定时执⾏37 CREATE EVENT EVENT13839 ON SCHEDULE EVERY 9 DAY STARTS NOW()40 ON COMPLETION PRESERVE ENABLE41 DO42 BEGIN43 CALL TOTAL();44 END454647484950 每个⽉的⼀号凌晨1 点执⾏51 CREATE EVENT EVENT25253 ON SCHEDULE EVERY 1 MONTH STARTS DATE_ADD(DATE_ADD(DATE_SUB(CURDATE(),INTERVAL DAY(CURDATE())-1 DAY), INTERVAL 1 MONTH),INTERVAL 1 HOUR)54 ON COMPLETION PRESERVE ENABLE55 DO56 BEGIN57 CALL STAT();58 END59606162 每个季度⼀号的凌晨2点执⾏6364 CREATE EVENT TOTAL_SEASON_EVENT6566 ON SCHEDULE EVERY 1 QUARTER STARTS DATE_ADD(DATE_ADD(DATE( CONCAT(YEAR(CURDATE()),'-',ELT(QUARTER(CURDATE()),1,4,7,10),'-',1)),INTERVAL 1 QUARTER),INTERVAL 2 HOUR)67 ON COMPLETION PRESERVE ENABLE68 DO69 BEGIN70 CALL SEASON_STAT();71 END7273747576 每年1⽉1号凌晨四点执⾏77 CREATE EVENT TOTAL_YEAR_EVENT7879 ON SCHEDULE EVERY 1 YEAR STARTS DATE_ADD(DATE(CONCAT(YEAR(CURDATE()) + 1,'-',1,'-',1)),INTERVAL 4 HOUR)80 ON COMPLETION PRESERVE ENABLE81 DO82 BEGIN83 CALL YEAR_STAT();84 END。

Mysql下⾃动删除指定时间以前的记录的操作⽅法关于Event：mysql5.1版本开始引进event概念。

event既“时间触发器”，与triggers的事件触发不同，event类似与linux crontab 计划任务，⽤于时间触发。

通过单独或调⽤存储过程使⽤，在某⼀特定的时间点，触发相关的SQL语句或存储过程。

⾸先删除2天以前记录的SQL语句(webserver_monitormemory为表名，time为时间字段)：delete From webserver_monitormemory where DATE(time) <= DATE(DATE_SUB(NOW(),INTERVAL 2 day));创建存储过程：DELIMITER //CREATE PROCEDURE autodel()-> BEGIN-> delete From webserver_monitormemory where DATE(time) <= DATE(DATE_SUB(NOW(),INTERVAL 2 day));-> END-> //DELIMITER ;创建事件，定制每天执⾏autodel的存储过程：CREATE EVENT `event_auto_del_memorydata`ON SCHEDULE EVERY 1 DAY STARTS '2017-11-20 00:00:00'ON COMPLETION NOT PRESERVE ENABLE DO CALL autodel();开启事件计划（调度器）4种⽅法。

键值1或者ON表⽰开启；0或者OFF表⽰关闭：SET GLOBAL event_scheduler = 1;SET @@global.event_scheduler = 1;SET GLOBAL event_scheduler = ON;SET @@global.event_scheduler = ON;查看当前是否已开启事件计划（调度器）3种⽅法：SHOW VARIABLES LIKE 'event_scheduler';SELECT @@event_scheduler;SHOW PROCESSLIST;事件开启与关闭：ALTER EVENT event_auto_del_memorydata ON COMPLETION PRESERVE ENABLE; //开启某事件ALTER EVENT event_auto_del_memorydata ON COMPLETION PRESERVE DISABLE; //关闭某事件这个是最简单但是也是最重要的，我们要⼿动的启动这个定时器，要不然是没法⼯作的。

如何在MySQL中设置和管理定时任务在MySQL中设置和管理定时任务是数据库管理中的一个重要方面。

定时任务是指按照预定的时间规律自动执行的任务，通过设置和管理定时任务，可以实现数据库的自动化操作和定时数据处理。

本文将介绍如何在MySQL中设置和管理定时任务，以及一些相关的注意事项。

一、MySQL中的定时任务基础MySQL中的定时任务主要依赖于事件调度器(Event Scheduler)的功能实现。

事件调度器是MySQL内置的一种任务调度器，可以按照预定的时间规律自动执行指定的任务。

MySQL中的事件调度器使用基于SQL的语法来创建和管理定时任务，通过执行一系列的SQL语句来实现特定的操作。

事件调度器的任务执行是在后台进行的，不会影响到前台的数据库操作。

二、设置定时任务在MySQL中设置定时任务需要使用CREATE EVENT语句来创建一个事件，并指定该事件的执行时间和要执行的任务。

下面是一个创建定时任务的示例：```CREATE EVENT my_eventON SCHEDULE AT '2020-01-01 00:00:00'DOBEGIN-- 任务操作语句END;```在上面的示例中，CREATE EVENT语句用于创建一个名为my_event的事件。

ON SCHEDULE子句用于指定事件的执行时间，可以使用AT关键字指定具体的日期和时间。

在DO子句中可以编写一系列的SQL语句来实现具体的任务操作。

在任务操作中可以使用MySQL的各种语句和函数，以实现特定的数据处理和操作需求。

三、管理定时任务在MySQL中，可以使用SHOW EVENTS语句来查看当前数据库中定义的所有定时任务。

例如，执行以下语句可以查看当前数据库中所有定时任务的相关信息：```SHOW EVENTS;```使用ALTER EVENT语句可以修改已存在的定时任务的执行时间和任务操作。

例如，执行以下语句可以将名为my_event的任务的执行时间修改为'2021-01-01 00:00:00'：```ALTER EVENT my_eventON SCHEDULE AT '2021-01-01 00:00:00';```使用DROP EVENT语句可以删除指定的定时任务。

节目安排表作文英语Title: Crafting a Comprehensive Event Schedule.In the realm of event planning, crafting a comprehensive event schedule is paramount. It serves as a roadmap, guiding planners, participants, and stakeholders through the various stages of an event, ensuring a smooth and successful outcome. This article delves into the intricacies of creating such a schedule, highlighting key considerations and best practices.1. Understanding the Event Objectives.The foundation of any event schedule is a clear understanding of the event's objectives. Is the event designed to raise awareness, generate leads, celebrate a milestone, or something else? Understanding the goals helps shape the structure and content of the schedule, ensuring it aligns with the event's overall vision.2. Target Audience Considerations.The target audience is another crucial factor. Who are the expected participants? What are their interests, needs, and expectations? Understanding the audience helps planners craft a schedule that resonates with their interests and keeps them engaged throughout the event.3. Scheduling the Keynote Speakers and Main Events.Keynote speakers and main events often set the tone for an entire event. They should be carefully timed and placed at strategic intervals throughout the schedule to maintain participant interest and engagement. Planners should also consider any logistical constraints, such as speaker availability and venue capacity, when scheduling these events.4. Balancing Activity Types.A diverse and balanced schedule keeps participants engaged and interested. A mix of educational sessions,networking opportunities, entertainment, and breaks is essential. Planners should avoid scheduling too many similar activities consecutively, as this can lead to participant fatigue and disengagement.5. Timing and Duration.Timing and duration are crucial considerations. The schedule should start at a reasonable hour and end before participants' attention spans begin to wane. Sessions should be timed to allow for ample networking and break time, without being too long or drawn out.6. Venue Considerations.The venue plays a pivotal role in event scheduling. Planners must consider venue capacity, layout, and accessibility when scheduling activities. Sessions that require special equipment or setup should be scheduled accordingly to avoid last-minute rushes or delays.7. Contingency Planning.No event schedule is complete without contingency planning. Planners should anticipate potential issues or delays and have plans in place to address them. This could include having backup speakers or activities ready to go if needed, as well as a plan for handling any unexpected logistical issues.8. Promoting the Schedule.Finally, promoting the schedule effectively is essential. Participants should have access to the schedule well before the event, allowing them to plan their attendance and participation. The schedule should also be easily accessible during the event, either via a printed handout or a digital platform.In conclusion, crafting a comprehensive event schedule requires a meticulous attention to detail and a deep understanding of the event's objectives and target audience. By considering key factors like timing, activity types, and venue logistics, planners can create a schedule that notonly meets the needs of the event but also exceeds the expectations of its participants. With effective planning and promotion, any event can be a resounding success.。

台球活动策划方案英文1. Introduction:The purpose of this event planning proposal is to organize a billiards event to engage professional players, enthusiasts, and spectators in an exciting and competitive environment. This event will provide a platform for participants to showcase their skills, promote bonding among billiards fans, and generate interest in the sport.2. Objective:The main objective of this event is to create an enjoyable and thrilling experience for billiards enthusiasts and spectators while promoting the sport. The specific goals are as follows:- Provide a platform for billiards players to compete and showcase their talent.- Create a fun and engaging environment for participants and spectators.- Increase awareness and interest in billiards as a sport.- Foster a sense of community among billiards enthusiasts.3. Date and Venue Selection:- The event will be held over a weekend to maximize participation and audience attendance. - Venue selection should consider the space required for billiards tables, seating arrangements, and spectator access.- The venue should have proper lighting and ventilation to create a comfortable environment.- Consider partnering with a local billiards club or sports facility to leverage their existing infrastructure and expertise.4. Budget:- Create a detailed budget plan considering all expenses, including venue rental, billiards table arrangements, promotional materials, prizes, and refreshments.- Explore potential sponsorship opportunities to help cover the costs and promote local businesses.- Allocate a portion of the budget for marketing and advertising to attract participants and spectators.5. Event Schedule:- Plan and coordinate the event schedule, including registration, warm-up sessions, qualifying rounds, and finals.- Consider the participants' availability and convenience when finalizing the schedule.- Plan breaks and sufficient resting time to avoid exhausting participants.6. Participant Registration:- Develop an online registration system to streamline the process.- Set registration fees to cover expenses and offer early-bird discounts to encourage early sign-ups.- Make registration forms available on the event website and social media platforms.- Communicate participant requirements, such as dress code and equipment regulations, in advance.7. Promotions and Marketing:- Design an attractive event logo and branding materials to create a cohesive visual identity. - Utilize social media platforms, local newspapers, billiards clubs, and sports communities for promotion.- Engage with billiards influencers and local celebrities to gain wider visibility.- Arrange interviews with professional billiards players to create excitement and generate interest.8. Event Logistics:- Arrange billiards tables and equipment rental from reputable suppliers.- Coordinate with professional referees to ensure fair gameplay and adherence to rules.- Arrange seating and viewing arrangements for spectators.- Provide refreshments and snacks for participants and spectators.9. Prizes and Awards:- Allocate a portion of the budget for enticing prizes to motivate participants.- Consider trophies, medals, certificates, and cash rewards for winners and runners-up.- Recognize achievements such as the highest break, best sportsmanship, and most improved player.10. Event Execution and Management:- Assemble a team of volunteers to assist with various aspects of the event, such as registration, scorekeeping, and crowd control.- Assign responsibilities and roles to each team member.- Conduct regular team meetings to ensure everyone is aware of their tasks and progress. 11. Safety Measures:- Ensure all billiards tables and equipment are safe and in proper working condition.- Place warning signs and instructions regarding the safe use of equipment.- Install proper lighting and keep the event area well-lit to prevent accidents.- Have a first aid kit available on-site and ensure access to medical facilities.12. Evaluation:- Collect feedback from participants, spectators, and volunteers.- Analyze the event's successes and areas of improvement for future events.- Assess whether the event achieved its objectives and measure its impact on promoting billiards as a sport.Conclusion:This comprehensive event planning proposal aims to create an exciting and memorable billiards event. By following these strategies, we can successfully bring together billiards players, fans, and enthusiasts to not only enjoy competitive gameplay but to also promote the sport and foster a sense of community. With proper planning, promotion, and execution, this event has the potential to become an annual highlight for billiards enthusiasts in the region.。