计划任务获取即将过期优惠券
是这样的，公司需要做一个功能，就是定期提醒用户优惠券即将过期，现在是定在提前3天通知用户，表很简单，就一个表，有coupon_id（优惠券id） user_id（用户id） end_time（优惠券结束时间）。计划每天跑一次脚本，但是如果直接按end_time来筛选，会导致，用户的一张优惠券会被提醒多次，假设一张优惠券31号过期，那今天脚本会跑到这张优惠券，明天还是会跑到这张。不知道有什么办法解决这个问题
回复内容：
是这样的，公司需要做一个功能，就是定期提醒用户优惠券即将过期，现在是定在提前3天通知用户，表很简单，就一个表，有coupon_id（优惠券id） user_id（用户id） end_time（优惠券结束时间）。计划每天跑一次脚本，但是如果直接按end_time来筛选，会导致，用户的一张优惠券会被提醒多次，假设一张优惠券31号过期，那今天脚本会跑到这张优惠券，明天还是会跑到这张。不知道有什么办法解决这个问题
看需求定义，
只提醒一次的，日期差条件=3
提醒多次一直到过期日，日期差条件
优惠券的结束时间是固定的，那么通知时间也是固定的，通知完一次后就停止咯
找个地方记下ID，下次直接忽略就行了啊，有多复杂呢，或者直接加多一个字段，做下标记，筛选忽略就行
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