Convert getdate() to int

问题:

When I run the following query:

select convert(int, getdate())

I get the result:

-----------
41238

(1 row(s) affected)

Does anyone knows what does this mean?

回答1:

Its the number of days since I think 1/1/1900, sql-server keeps the number of days since then.

Try dividing that number by roughly 365. You should get the value back in years (112). Since 1900 + 112 = 2012

回答2:

This is because SQL natively keeps the number of days since 01/01/1900

The decimal after the integer value is the time.

32.5 would equal 02/01/1900 12:00 pm

If you are looking to get and work with only part of the date as an integer I would recommend using datepart

This statement would return only the month and convert that value to an integer.

select convert(int, datepart(mm,getdate())