Convert INT to DATETIME (SQL)

Question

I am trying to convert a date to datetime but am getting errors. The datatype I\'m converting from is (float,null) and I\'d like to convert it to DATETIME.

The first

Answer 1

Try this:

select CONVERT(datetime, convert(varchar(10), 20120103))

Answer 2

you need to convert to char first because converting to int adds those days to 1900-01-01

select CONVERT (datetime,convert(char(8),rnwl_efctv_dt ))

here are some examples

select CONVERT (datetime,5)

1900-01-06 00:00:00.000

select CONVERT (datetime,20100101)

blows up, because you can't add 20100101 days to 1900-01-01..you go above the limit

convert to char first

declare @i int
select @i = 20100101
select CONVERT (datetime,convert(char(8),@i))