Oracle时间戳到sql server DateTime

Question

I have multiple statements from oracle database and I need to use them in SQL Server

insert into COMENZI (NR_COMANDA, DATA, MODALITATE, ID_CLIENT, STARE_COMANDA, ID_ANGAJAT)
values (2456, to_timestamp('08-11-1998 07:53:25.989889', 'dd-mm-yyyy hh24:mi:ss.ff'), 'direct', 117, 0, 163);

insert into COMENZI (NR_COMANDA, DATA, MODALITATE, ID_CLIENT, STARE_COMANDA, ID_ANGAJAT)
values (2457, to_timestamp('01-11-1999 09:22:16.162632', 'dd-mm-yyyy hh24:mi:ss.ff'), 'direct', 118, 5, 159);

How can I create a function to_timestamp that returns a DateTime with the given value?

Answer 1

The following works in SQL Server 2008 ( SQL Fiddle ):

select convert(datetime, left(t, 10), 105) +
       convert(time, substring(t, 12, 12), 114)
from (select '01-11-1999 09:22:16.162632' as t) t;

Ironically, it doesn't work in SQL Server 2012. There, I think you have to do:

select dateadd(ms, datediff(ms, 0,  convert(datetime, substring(t, 12, 12), 114)),
               convert(datetime, left(t, 10), 105)
              )
from (select '01-11-1999 09:22:16.162632' as t) t;

Note in both cases, this uses milliseconds rather than microseconds. I don't believe SQL Server offers date time value with that much precision.

Answer 2

If you change this statement

select convert(datetime, left(t, 10), 105) +
       convert(time, substring(t, 12, 12), 114)
from (select '01-11-1999 09:22:16.162632' as t) t;

into

select convert(datetime, left(t, 10), 105) +
       convert(datetime, substring(t, 12, 12), 114)
from (select '01-11-1999 09:22:16.162632' as t) t;

it will work correct with all SQL-Server versions

The error that datetime and time are incompatible types in the add-operator occurs only in SQL-Server 2012.