获取日期的默认值

Question

根据the doc，SQL Server中日期的默认值是

1900-01-01 00:00:00

我能以任何方式调用默认值吗？比如像这样

select isnull(date_column, default(date_column))
from my_table

Answer 1

也许：

SELECT DefaultDate = CAST(0 AS DATETIME) 

sql-Fiddle

如果你需要DATE，你也可以投射它：

SELECT DefaultDate = CAST(CAST(0 AS DATETIME) AS DATE)

sql-fiddle

Answer 2

select MinimumDate = cast(dateadd(d, 0, 0) as date)