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 line of this code works fine, but I get this error on the second line:
Arithmetic overflow error converting expression to data type datetime.
CAST(CAST( rnwl_efctv_dt AS INT) AS char(8)), CAST(CAST( rnwl_efctv_dt AS INT) AS DATETIME), 3 Answers
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)) Try this:
select CONVERT(datetime, convert(varchar(10), 20120103)) use a where clause on that field to ignore nulls and zero values
update table set BDOS= CONVERT(datetime, convert(char(8), field)) where isnull(field,0)<>0 
