mysql 定时任务 每月15号执行

#查看当前是否已开启事件调度器 如果显示 on 证明已经开启 如果显示off 证明是关闭状态 
show variables like 'event_scheduler';


#要想保证能够执行event事件，就必须保证定时器是开启状态，默认为关闭状态
set global event_scheduler =1;
#或者
set GLOBAL event_scheduler = ON;


# 如果原来存在该名字的任务计划则先删除
drop event if exists create_bill;


#每月15号结算上个月的所有订单 计算上个月所有店铺的统计数据 和 单个店铺的数据统计
#select subdate(curdate(),date_format(curdate(),'%e')); 前一月最后一天 【如：2015-08-31】 
#SELECT subdate(date_sub(curdate(),interval 1 month), date_format(date_sub(curdate(),interval 1 month),'%e')-1);  前一月第一天【如：2015-08-01】
DELIMITER ;;
create event create_bill on schedule every 1 month starts '2018-03-15 00:00:00' ON COMPLETION NOT PRESERVE ENABLE DO
BEGIN
INSERT INTO uc_bill (ub_number, ub_start_date, ub_end_date, strd_id, settlement_date, settlement_money, order_num, product_money, settlement_state, create_date, update_date)
select (select date_format(curdate(),'%Y%m')-1) as ub_number, 
(SELECT subdate(date_sub(curdate(),interval 1 month), date_format(date_sub(curdate(),interval 1 month),'%e')-1)) as ub_start_date, 
(select subdate(curdate(),date_format(curdate(),'%e'))) as ub_end_date, 
st_id, 
(select date_format(NOW(), '%Y-%m-%d %H:%i:%s')) as settlement_date,
sum(orderamount) settlement_money,
count(id) order_num,
sum(orderamount) product_money,
0,
now() create_date,
now() update_date
from od_order 
where create_date >= (SELECT subdate(date_sub(curdate(),interval 1 month), date_format(date_sub(curdate(),interval 1 month),'%e')-1)) and create_date <= (select subdate(curdate(),date_format(curdate(),'%e')))
group by st_id;


INSERT INTO uc_bill (ub_number, ub_start_date, ub_end_date, settlement_date, settlement_money, order_num, product_money, settlement_state, create_date, update_date)
select (select date_format(curdate(),'%Y%m')-1) as ub_number, 
(SELECT subdate(date_sub(curdate(),interval 1 month), date_format(date_sub(curdate(),interval 1 month),'%e')-1)) as ub_start_date, 
(select subdate(curdate(),date_format(curdate(),'%e'))) as ub_end_date, 
(select date_format(NOW(), '%Y-%m-%d %H:%i:%s')) as settlement_date,
sum(orderamount) settlement_money,
count(id) order_num,
sum(orderamount) product_money,
0,
now() create_date,
now() update_date
from od_order 
where create_date >= (SELECT subdate(date_sub(curdate(),interval 1 month), date_format(date_sub(curdate(),interval 1 month),'%e')-1)) and create_date <= (select subdate(curdate(),date_format(curdate(),'%e')))
group by DATE_FORMAT(create_date,'%Y-%m');

end
;;
DELIMITER ;


# 停止任务
ALTER EVENT create_bill DISABLE;


#开启任务
ALTER EVENT create_bill enable;


# 查看状态
select * from mysql.event




select date_format(curdate(),'%e');    # 当月的第几天【几号】  【如：15】  
select subdate(curdate(),date_format(curdate(),'%e'));    # 前一月最后一天 【如：2015-08-31】  
SELECT subdate(date_sub(curdate(),interval 1 month), date_format(date_sub(curdate(),interval 1 month),'%e')-1);  #前一月第一天【如：2015-08-01】

select date_format(NOW(), '%Y-%m-%d %H:%i:%s');  #当前时间

select date_sub(now() ,interval -3 day); #当前日期后三天

select date_sub(now() ,interval 3 day); #当前日期前三天

SELECT * FROM company_information WHERE create_date+INTERVAL 12 HOUR<=NOW()；#查询12小时之前的数据

delete from company_information where TO_DAYS(NOW())-TO_DAYS(create_date) > 7;#删除7天前的数据

第一次写定时任务  感觉良好 特此记录 ！！！