sql server Dateadd()函数

sql文档：https://docs.microsoft.com/zh-cn/sql/t-sql/functions/dateadd-transact-sql?view=sql-server-2017

语法：DATEADD (datepart , number , date )

参数说明：

1.datepart：

https://docs.microsoft.com/zh-cn/sql/t-sql/functions/dateadd-transact-sql?view=sql-server-2017

 

https://www.cnblogs.com/vip7758458/p/8134582.html

 

https://www.cnblogs.com/shamo89/p/9489603.html

 

https://www.cnblogs.com/xingyadian/p/9056269.html

 

 

https://blog.csdn.net/qq_33342287/article/details/78692624

 

https://blog.csdn.net/shellching/article/details/80693577

2.number：

 

3.date：