sql server datetime类型字段使用isnull返回1900-01-01 00:00:00.000的问题

若字段定义的类型为datetime,插入为''(空),那么会默认值为1900-01-01 00:00:00.000

解决方法查询的时候过滤下cast(nullif('','') as datetime)

select cast('' as datetime)
, cast(nullif('','') as datetime)
, isnull(cast(nullif('','') as datetime),getdate())

转载于:https://www.cnblogs.com/hofmann/p/9268980.html