摘要：
var leftFinal = from l in lefts join r in rights on l equals r.Left into lrs from lr in lrs.DefaultIfEmpty() select new { LeftId = l.Id, RightId = ((l 阅读全文
摘要：
原文章地址：https://blog.csdn.net/asdkwq/article/details/77881850 MySQL 为日期增加一个时间间隔：date_add() now() //now函数为获取当前时间 select date_add(now(), interval 1 day); 阅读全文