Question

I have legacy system where all date fields are maintained in YMD format. Example:

20101123
this is date: 11/23/2010

I’m looking for most optimal way to convert from number to date field.

Here is what I came up with:

declare @ymd int

set @ymd = 20101122

select @ymd, convert(datetime, cast(@ymd as varchar(100)), 112)

This is pretty good solution but I’m wandering if someone has better way doing it

Answer 1

try this:

CONVERT(DATETIME, CONVERT(NVARCHAR, YYYYMMDD))

For example:

SELECT CONVERT(DATETIME, CONVERT(NVARCHAR, 20100401))

Results in:

2010-04-01 00:00:00.000