Issue with nested DateTime(Concat('2018','-03-08'))

The below query shows that Concat works by itself to create a string, and DateTime works by itself with a literal string to create a date. But DateTime refuses to work with the return value from Concat, it will not create a Date from two concatenated strings. We need to concatenate two strings because we need to pull the Year from the part of one date in the database, and force the date to March 8 (-03-08) to create a comparison date.

Try the SQL below in /orion/admin/swis.aspx

Then remove the comment (--) from the fourth line and try again, you'll see it throws an error.

SELECT TransactionId

    , Concat('2018','-03-08') as strDate

    , DateTime('2018-03-08') as tempDate

--  , DateTime(Concat('2018','-03-08')) as tempDate2

FROM Orion.SEUM.ResponseTime where TransactionId= 168 and Status <> 0